Homework Helper Chapter 11 Lesson 11.1 1. As shown.2. 22 centimeters (6 + 5 + 6 + 5)3. 20 centimeters (5 + 5 + 5 + 5)4. 2 centimeters (22 – 20)5.

The rectangle’s perimeter is 12 cm because each unit = 1 centimeter. I count each side 4 + 2 + 4 + 2 = 12 cm.The other’s shapes perimeter is 16 because 2 + 1 + 1 + 2 + 1 + 1 + 2 + 1 + 1 + 2 + 1 + 1 = 16.

Lesson Check/Spiral Review1. 20 centimeters2. 26 centimeters3. , , 4. 8:305. > 6. kilogram

Homework Helper Chapter 11 Lesson 11.2 1. As shown.2.

13 centimeters

3. 20 inches4. 18 centimeters5. 5 2

5 5 4 2 4 2 5 6

Lesson Check/Spiral Review1. 6 inches2. 8 inches 3. 20 units4. 3:26 P.M. 5. 13 liters 6. <

4

51

12

Homework Helper Chapter 11 Lesson 11.3

1. As shown2. t = 15 inches ( 7 + 23 + 12 + 12 + 23 = 77; 92 – 77 = 15)3. 3 feet (5 + 5 = 10; 16 – 10 = 6; 6 4. 8 inches (32 5. Possible Answer: If you know the perimeter and one side,

you can double that side and subtract it from the perimeter, then divide that number in half to get the unknown side. For example, if the perimeter of a rectangle is 24 inches and I know one side is 3 inches, that means its opposite side is 3 inches also. 3 + 3 = 6. I subtract 24 – 6 to get 18 inches for the 2 longer sides. I divide 18 by 2 to get 9 inches for each long side of the rectangle.

Lesson Check/Spiral Review1. 6 inches 2. 9 inches 3. 4 x 7 4. 5 model cars5. 45 minutes 6. = 1

Homework Helper Chapter 11 Lesson 11.4

1. As shown.2. 4 square units3. 5 square units4. area5. perimeter6. 12 square units7. 16 units8. Possible Answer:

8 square units I counted the boxes inside to find the area.

Lesson Check/Spiral Review1. 3 square units 2. 5 square units3. 6 weeks

4. 7:45 A.M.5. 10 kilograms

Homework Helper Chapter 11 Lesson 11.5

1. As shown. 2. 16 square centimeters3. 11 square centimeters4. 22 square centimeters5. 16 square centimeters6. Possible Explanation: To find the area, just count the number

of square tiles. The number of tiles is the area of the figure.

Lesson Check/Spiral Review1. 23 square feet 2. 19 square feet3. 36 rolls4. 8 liters

Homework Helper Chapter 11 Lesson 11.61. As shown.2. 16 square feet3. 12 square meters4. 24 square meters5. 15 square meters6. 20 square feet7. 8 square inches8. Possible Answer: You can count the unit squares inside the shape. You can use repeated addition by counting the number of unit squares in each row and add that number together for how many rows there are. You can use multiplication by counting the number of unit squares in each row and multiplying it by the number of rows.

Lesson Check/Spiral Review1. 9 square meters2. 10 square feet3. <4. 8 cards5. 7:50 A.M.6. 12 feet

Homework Helper Chapter 11 Lesson 11.71.

2. For each mural, the width doubles and the length stays the same.

3. For each mural, the area doubles.4. Joseph made 4 squares. Each square’s width was twice

the size as the one before it. The first square’s width was 4 inches. Find the area of each square.

Lesson Check/Spiral Review1. 12 square centimeters2. The area increases by 9 square feet.3. 9 cards4. 4 eggs5. 80 large beads 6. 54 square feet

Mural L Length(in meters)

Width(in meters)

Area(in square meters)

A 2 1 2

B 2 2 4

C 2 4 8

D 2 8 16

1 1 inch 2 inches

4 inches 8 inches

2 sq. in. 4 sq. in. 16 sq. in. 64 sq. in.

Homework Helper Chapter 11 Lesson 11.81. As shown.2. 3 x 4 = 12; 3 x 5 = 15; 12 + 15 = 27; 27 square units

3. Possible Answer: Rectangle 1: 2 x 5 = 10 Rectangle 2: 3 x 7 = 21 10 + 21 = 31 square units4. Possible line is shown.

5. 75 square feet (5 x 3 = 15; 6 x 10 = 60; 15 + 60 = 75)6. 3 x 3 = 9; 3 x 3 = 9; 3 x 11 = 33 9 + 9 + 33 = 51 square units

Lesson Check/Spiral Review1. 18 square yards2. 30 square meters3. 4 x 7 = 28 or 7 x 4 = 284. 12 centimeters5. fourths 6. 2 inches

Homework Helper Chapter 11 Lesson 11.91. A: As shown. B: Perimeter = 12 units; Area = 8 square units Rectangle A has a greater area.2. A: Perimeter = 10 units; Area = 4 square units B: Perimeter = 10 units; Area = 6 square units Rectangle B has a greater area.3. Tara’s; 9 x 8 = 72 and 7 x 10 = 70; 72 > 70

4.

6 + 1 + 6 + 1 3 + 4 + 3 + 4 2 + 5 + 2 + 5All three rectangles have a perimeter of 14 units. The rectangle in the middle has the greatest area (10 square units). The first rectangle has the least area (6 square units).

Lesson Check/Spiral Review1. Possible Solution: 2. A: P = 24 units A = 27 square units B: P = 24 units A = 35 square units Rectangle B has a greater area.3. 56 square units4. 7 feet

Homework Helper Chapter 11 Lesson 11.10 1. A: A = 8 square units P = 18 units B: A = 8 square units P = 12 units Rectangle A has a greater perimeter.2. A: A = 12 square units P = 14 units B: A = 12 square units P = 16 units Rectangle B has a grater perimeter.3. The areas are the same (20 square units).4. Design A5. Possible Answer:

Lesson Check/Spiral Review1. Rectangle B2. Rectangle A3. 2

4. , , 5. < or >