Chapter 15 Review - Perimeter and Area

Find the perimeter.

• 30

• 25

• 22

• 26

Write an equation to find the perimeter. Pick two answers.

• 5 + 1 + 3 + 7 + 11 = 27 ft

• 5 + 3 + 7 + 11 = 26 ft

• 6 + 10 + 11 = 27 ft

• 10 + 5 + 11 = 26 ft

Tags

CCSS.3.MD.D.8

Write an equation to find the perimeter of the rhombus.

Answer explanation

Answer is 9 + 9 + 9 + 9 = 36 or 9 x 4 = 36.

Tags

CCSS.3.MD.D.8

Find the length of y.

• 5 m

• 6 m

• 7 m

• 8 m

Tags

CCSS.3.MD.D.8

Find the length of each side.

• 3 in

• 4 in

• 5 in

• 6 in

Answer explanation

30 inches/5 sides = 6 inches per side.

Tags

CCSS.3.MD.D.8

Answer explanation

As you go left to right, the areas of each polygon are decreasing. But the perimeter is increasing. With a square the area is greater because there is more space inside the shape. But with a skinny rectangle the area is decreasing because the shape is more narrow and has less space inside.

Tags

CCSS.3.MD.D.8

Answer explanation

The kids will ride farther around Park B because it will have a greater perimeter than Park A. With a narrow rectangle the perimeter increases but with a square the perimeter decreases.

Tags

CCSS.3.MD.D.8

Answer explanation

4x6 = 24, 8x3=24

Tags

CCSS.3.MD.D.8

(a)  

Answer explanation

Perimeter is 24 m. So we need to create a skinny rectangle with a perimeter of 24 m.

Tags

CCSS.3.MD.D.8

(a)  

Answer explanation

145 + 145 = 290 310-290= 20 20/2 = 10

Tags

CCSS.4.MD.A.3