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Chapter 8 – Geometry- Lesson 8-1 Relating Solids and Plane FiguresSeatwork Content Text Pages 434 -437
Below is a study guide that you can use for this unit. Memorize the shapes and their names below. Practice each night so by the end of the unit these and other terms would be easy to remember.
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Chapter 8 – Geometry- Lesson 8-1 Relating Solids and Plane FiguresSeatwork Content Text Pages 434 -437
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Chapter 8 – Geometry- Lesson 8-1 Relating Solids and Plane FiguresHomework Content Text Pages 434 -437
Name: ________________________________________
Cube Triangular RectangularRectangular Prism Prism
Pyramid
Remember that a solid figure has three dimensions.
Complete the chart below for each figure.
Solid Figure Number of faces
Number of Edges
Number of Vertices
CubeTriangular PrismRectangular PrismRectangular PyramidLabel the following shapes
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In a flat surfaced solid figure, each flat surface is called a face.
An edge is a line segment where 2 faces meet
A vertex is where 3 or more edges meet
__________________ ___________________ ___________________Chapter 8 – Geometry- Lesson 8-2 Polygons Seatwork Content Text Pages 438 -439
Below is a study guide that you can use for this unit. Memorize the shapes and their names below. Practice each night so by the end of the unit these and other terms would be easy to remember.
The following figure is not a polygon as it is not a closed figure.
A circle is not a polygon as it
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does not have straight sides.
Chapter 8 – Geometry- Lesson 8-2 Polygons Seatwork Content Text Pages 438 -439
Remember a polygon is a closed plane figure made of line segments. A polygon is regular if all its sides are equal and all its angles are equal.
Directions: Name the polygon. Then tell how many sides it has.
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Chapter 8 – Geometry- Lesson 8-2 Polygons Homework Content Text Pages 438 -439
Name: ________________________________________
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Remember a polygon is a closed plane figure made of line segments. A polygon is regular if all its sides are equal and all its angles are equal.
Directions: Name the polygon. Then tell how many sides it has.
Directions: Tell whether the shape is a regular polygon, irregular polygon or not a polygon.
Chapter 8 – Geometry- Content Text Pages 440-441
Word BankTriangle Quadrilateral Pentagon HexagonOctagon# of sides _______
# of sides _______
# of sides _______
# of sides _______
# of sides _______
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Lesson 8-3 SEATWORK Lines, Line Segments, Rays, and Angles
Name: ________________________________________
Directions: Use the word bank to correctly label the picture.
Directions: Use the word bank to correctly label the picture.
Use the drawing on the right to answer the following questions
Name three line segments , _____, _____, ______
Word Bankpoint line line segment right angleobtuse angle acute anglestraight angle ray
. ...
.
Word BankIntersecting linesParallel linesPerpendicular lines
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Name two rays _________, __________
Name an angle ___________________Chapter 8 – Geometry- Lesson 8-3 HOMEWORK Lines, Line Segments, Rays, and Angles Content Text Pages 440-441
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GO RIGHT ON TO THE NEXT PAGEChapter 8 – Geometry- Lesson 8-3 HOMEWORK Lines, Line Segments, Rays, and Angles Content Text Pages 440-441
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GO RIGHT ON TO THE NEXT PAGE
Chapter 8 – Geometry- Lesson 8-3 HOMEWORK Lines, Line Segments, Rays, and Angles
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Content Text Pages 444-447
Name: ________________________________________
Classify each triangle by its sides (isosceles, scalene, equilateral) AND then by its angles (acute, obtuse, right).
Directions: Use the word bank to correctly label the picture.
Word BankRectangle square Trapezoid rhombusparallelogram
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Chapter 8 – Geometry- Lesson 8-5 CirclesContent Text Pages 448-449
Name: ________________________________________
Use the word bank on the right to draw an arrow to each part of the circle.
For each circle shown, find the length of the diameter.
Center
Chord
Radius
Diameter
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Chapter 8 – Geometry- Lesson 8-6 Congruent Figures and MotionsContent Text Pages 452- 455
Name: ________________________________________
Slides, Flips, and Turns Directions: Choose the correct answer to each of the following problems.
1. The above arrow moved 90° to the right. This is an example of a ______.
A. slide B. flip C. turn 2. The example below is a demonstration of a
__________.
15 ft
22 ft
103 ft
13 in
19 ft 22 in
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A. slide B. flip C. turn
3. The change in the position of the triangles
in Set A to the position of the triangles in Set B is an illustration of a __________.
A. slide B. flip C. turn 4. The example below is a demonstration of a
__________. A. slide B. flip C. turn 5. In the example below, the triangles going
from left to right is an illustration of a __________.
A. slide B. flip C. turn 6. What is it called when the arrow in picture
A is moved up to the position in picture B? A. slide B. flip C. turn
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Set A Set B
Picture A Picture B
7. The arrow below in picture B is a mirror
image of the arrow in picture A. This transformation is called a __________.
A. slide B. flip C. turn 8. Moving the triangle from Point A to Point B
is called a _________.
A. slide B. flip C. turn
9. The example below is a demonstration of a __________.
A. slide B. flip C. turn 10.
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Picture A Picture B
Point A Point B
Figure A Figure B Figure C Figure D
Which of the above illustrations represents a flip?
A. Figure A B. Figure B C. Figure C D. Figure D
Chapter 8 – Geometry- Lesson 8-7 SymmetryContent Text Pages 456- 457
Name: ________________________________________
For each flag, draw the line of symmetry (if there is one).
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Chapter 8 – Geometry- Lesson 8-8 Similar FiguresContent Text Pages 458- 459
Name: ________________________________________
Do the figures in each pair appear to be similar? If so are they also congruent?
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Chapter 8 – Geometry- Lesson 8-10 PerimeterContent Text Pages 464- 465
Name: ________________________________________
1. Mrs. Ames wants to buy carpet for the room shown below.
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2. Beth is making a lid for her jewelry box with square tiles, as shown below.
3. Look at the rectangles below.
Find the perimeter of the following polygons. The first three are REGULAR polygons.
Chapter 8 – Geometry- Lesson 8-11 Area
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How much carpeting does she need to buy to cover the floor area?
What is the area of Beth’s jewelry-box lid?
The perimeter of rectangle Y is how many centimeters greater than the perimeter of rectangle Z?
P= __________ P= __________ P= __________
P= __________ P= __________
Content Text Pages 468- 471Name: ________________________________________
Find the areas of the following shapes.
Chapter 8 – Geometry- Lesson 8-13 Volume
6 ft
4 ft
8 ft
7 ft
3 ft
12 ft
5 ft
4 ft
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Draw segments to divide the following complex shape into rectangles. Find the areas of each rectangle and add.
Area = __________________
5 ft 3ft
10 ft
11 ft6 ft
Draw segments to divide the following complex shape into less complex shapes. Find the areas of each shape and add.
Area = __________________
12 ft
7 ft9 ft
Content Text Pages 468- 471Name: ________________________________________
Find the volume of the following shapes.
V = _________ V = _________ V = _________
A rectangular Prism has a length of 7 cm, a width of 4 cm, and a height of 3 cm. What is the volume of this prism?
________________
The length of an edge of a cube is, 5 ft. What is the total volume of twoCubes of the same size?
________________
If a cube has a volume of 64 cubic units, How long is each edge?
________________
Find the volume of the following shape. The triangle is a right triagle.
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7 in. 2 in.
5 in.
3 in.
9 in.6 in. 4 in.8 in.
4 in.
4 ft 9 ft
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Chapter 8 – Geometry- Lesson 8-13 Circumference of CirclesContent Name: ________________________________________
To find the circumference of a circle.
Firstly we need to find the radiusThe radius is half the length of the diameter
r =
r = 3 cm
So C = 2 π rC = 2 × 3.14 × 3
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3 ft
6 cm
= 18.84 cmExercise 1
Find the circumference of each of the following circles
1. 2.3.
4. 5.6.
Chapter 8 – Geometry- Lesson 8-13 Circumference of CirclesContent Name: ________________________________________
Find the CIRCUMFERENCEof the following circles
1. 2.
3. 4.
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2 cm 5 cm
8 cm
12 cm 2.4 cm
16.4 cm
2 cm
4 cm
1.4 cm 8 cm
5. 6.
Chapter 8 – Geometry- Lesson 8-14 AREA of CirclesContent Name: ________________________________________
Find the area of the following circles
1. 2.
3. 4.
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18 cm3.4 cm
2 cm
4 cm
1.4 cm 8 cm
5. 6.
Chapter 8 – Geometry- Lesson 8-13 Extra Circumference of CirclesContent Name: ________________________________________
Exercise
1. A circular pond has a diameter of 3.2 m.
a) What is the area of the pond?
b) What is the circumference?
2. A baseball stadium has a circular patch with a radius of 100 metres.
a) The groundsman is going to use a fertilizer and needs to know the area of the pitch. What is the area?
b) He also needs to know what the distance is all
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18 cm3.4 cm
the way round. What is this dimension called and what is its value?
3. The diameter of the Earth at the equator is rather difficult to measure – we would need to dig a very long tunnel!! It is much easier to measure the circumference. The circumference of the Earth is 40,000 km. Can you calculate its diameter?
You could use a calculator and trial and improvement but make a note of each trial and the result.
Chapter 8 – Geometry- Lesson AreaContent Name: ________________________________________
For each of the following shapes find:
a) the perimeter or circumference
b) the area
1.
2.6 cm
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Chapter 8 – Geometry- Lesson AreaContent Name: ________________________________________
For each of the following shapes find: a) the perimeter or circumferenceb) the area
A window frame in the shape of a rectangle is 90 centimeters long and 40 centimeters wide What is the perimeter of the window frame?
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A = _______P =
A = _______P =
A = _______P =
A = _______P =
A = _______P =
What is the area of the shaded part of the floor?
Find the Area of the following figures
1.____________
2.____________
3. ____________
4.____________
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5.____________
Tutorials
The area of a composite shape is calculated by splitting the shape into separate shapes. The area of each one is then calculated and the areas are added together to find the total area. In examples below the shapes have been divided into two shapes.
Example 1
Area of shape A = 6 × 4 = 24 cm2
B = 3 × 2 = 6 cm2
Total Area = 24 + 6
= 30 cm2
Example 2
Area of shape C = (5 × 4) = 10 cm2
D = 4 × 3 = 12 cm2
Total Area = 10 + 12
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3 cm
C
D
4 cm
A
B
7 cm
4 cm
6 cm
4 cm
5 cm
= 22 cm2
The distance around the edge of a circle has a special name. It is called the circumference.The circumference is just like the perimeter but is only used when talking about circles.If you know the radius or the diameter of a circle you can calculate its circumference.
The circumference is given by:
C = 2 π r π is a special number and
is always 3.14Example 1
C = 2 π rC = 2 × 3.14 × 5Circumference = 31.4 cm
Example 2
Firstly we need to find the radiusThe radius is half the length of the diameter
r =
r = 3 cm
So C = 2 π rC = 2 × 3.14 × 3
= 18.84 cm
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Area of a circle
5 cm
Circumference of a circle
6 cm
The area of a circle is given by
Area = π × (radius) 2
A = π r 2
Example
Area = π r 2
= π × 52
= 3.14 × 25
= 78.5 cm2
Remember that area always has square units. In this case since the radius is in cm, the area is in square centimetres (cm2)
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5 cm
In a parallelogram the opposite sides are parallel.
Parallelogram area = b × h
A = b × h
Base (b)
Example
6 cm
8 cm
Area = b × h
= 8 × 6
= 48
Area = 48 cm2
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Height(h)