1. 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.

2. Homework Helper Chapter 11 Lesson 11.2 1.As shown. 2. 13 centimeters 3.20 inches 4.18 centimeters 5. 5 2 5 5 4 2 4 2 5 6 Lesson Check/Spiral Review 1.6 inches 2.8 inches 3.20 units 4.3:26 P.M. 5.13 liters 6.< 4 5 1 1 2

4. Homework Helper Chapter 11 Lesson 11.4 1.As shown. 2.4 square units 3.5 square units 4.area 5.perimeter 6.12 square units 7.16 units 8.Possible Answer: 8 square units I counted the boxes inside to find the area.

5. Homework Helper Chapter 11 Lesson 11.5 1.As shown. 2.16 square centimeters 3.11 square centimeters 4.22 square centimeters 5.16 square centimeters 6.Possible Explanation: To find the area, just count the number of square tiles. The number of tiles is the area of the figure.

6. Homework Helper Chapter 11 Lesson 11.6 1. As shown. 2.16 square feet 3.12 square meters 4.24 square meters 5.15 square meters 6.20 square feet 7.8 square inches 8.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 Review 1.9 square meters 2.10 square feet 3.< 4.8 cards 5.7:50 A.M. 6.12 feet

7. Homework Helper Chapter 11 Lesson 11.7 1. 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 Review 1.12 square centimeters 2.The area increases by 9 square feet. 3.9 cards 4.4 eggs 5.80 large beads 6.54 square feet MuralL Length (in meters) Width (in meters) Area (in square meters) A212 B224 C248 D2816 1 1 inch 2 inches 4 inches 8 inches 2 sq. in. 4 sq. in. 16 sq. in. 64 sq. in.

8. Homework Helper Chapter 11 Lesson 11.8 1. 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 units 4. 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 Review 1.18 square yards 2.30 square meters 3.4 x 7 = 28 or 7 x 4 = 28 4.12 centimeters 5.fourths 6.2 inches

9. Homework Helper Chapter 11 Lesson 11.9 1.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 + 5 All 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 Review 1.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 units 4.7 feet

10. 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 A 5.Possible Answer: