area & perimeter (review)
DESCRIPTION
Area & Perimeter (Review). How would you find out how much carpet you would need for your bedroom? Learner Objective(s): As a result in learning, students should be able to… find the area of triangles, quadrilaterals, and trapezoids and apply this in composite figures CCES: - PowerPoint PPT PresentationTRANSCRIPT
Area & Perimeter (Review)
How would you find out how much
carpet you would need for your
bedroom?Learner Objective(s):
As a result in learning, students should be able to… find the area of triangles, quadrilaterals, and trapezoids and apply this in composite figures
CCES:• .G.6 Solve real-world and mathematical problems involving area, volume and surface area of two- and three-
dimensional objects composed of triangles, quadrilaterals, polygons, cubes, and right prisms.• MP.1 Make sense of problems and persevere in solving them.• MP.2 Reason abstractly and quantitatively.• MP.3 Construct viable arguments and critique the reasoning of others.• MP.4 Model with mathematics• MP.6 Attend to precision.
Using your prior knowledge, can you give me some real life
examples of when you would use area? perimeter?
Real life examples Area- how much carpet to put in
your living room.
Perimeter- put up a fence around your backyard.
Amount of surface space that a flat object has. It’s always measured in square units. Ex: cm2, mm2, ft2
Area = 15 square feet, or 15ft2
Lets find the area of this surface if each square is equal to one foot using number squares. Count the number of squares.
1 2
3
4 5 6 7 8
9 10 11 12 13 14
15
How about other polygons?
Triangle
Square , Rectangle, & Parallelogram
Area = b x h
Trapezoid
Area = ½ (b1 + b2) * h
Let’s review…
Area of a triangle is __________
Area of a square, rectangle & parallelogram is __________
Area of a trapezoid is ________
The distance around the outside edge of a flat object. It’s the total number of units
Perimeter = 24 feet or 24 ft.
Let’s find the perimeter of this surface if each square is equal to one foot. Count the number of sides.
Let’s Practice…
Ticket out the door
How would you find out how
much carpet you would need
for your bedroom?