Area of Circles

A circle pool has a radius of 7.5 ft. Monica wants to know how many ft of a pool cover she needs to buy?

• 23.55 ft²

• 176.63 ft²

• 47.1 ft²

• 706.5 ft²

Tags

CCSS.7.G.B.4

Alex has trained his puppy, Zoey, to jump through a ring. According to Alex's measurements and calculations, the ring has a diameter of 3.5 feet. What is the ring's circumference (use 3.14 for pi)?

• 11.32 ft

• 12.25 ft

• 10.99 ft

• 8.75 ft

Tags

CCSS.7.G.B.4

A dog is leashed up to a peg at the center of the backyard. If the length of the rope is 18.3 m (radius), what will be the maximum area the dog can walk around?

• 1051.6 m²

• 57.5 m²

• 75.76 m²

• 4206 m²

Tags

CCSS.7.G.B.4

A clock face has a diameter of 10 inches. What is the approximate area of the clock face in square inches?

• 314 in²

• 31.4 in²

• 7.85 in²

• 78.5 in²

Tags

CCSS.7.G.B.4

A sprinkler that sprays water in a circular area can be adjusted to spray up to 30 feet. To the nearest tenth, what is the maximum area of lawn that can be watered by the sprinkler?

• 188.4 ft²

• 706.5 ft²

• 183.6 ft²

• 2,826 ft²

Tags

CCSS.HSG.C.B.5

Olivia ordered a 12'' cookie cake for her birthday. She requested the icing to have a sun covering the center and be 8'' in diameter. How much of Olivia's cookie cake is covered by icing?

• 12.6

• 50.3

• 201.1

• 452.4

Tags

CCSS.7.G.B.4

Wyatt notices that a local pizza parlor is running a special on their 16'' supreme thin crust pizza with no crust around the outer edge. If Wyatt orders 3 pizzas, what would he total area of the three pizzas be?

• 201.1 square inches

• 2,412.7 square inches

• 75.4 square inches

• 603.2 square inches

Tags

CCSS.7.G.B.4

What is the formula to find the area of a circle?

• A = πd

• A = 2πr

• A = πr²

• A = xyz

Tags

CCSS.7.G.B.4

What is the area of this circle?

• 1256.64

• 31.41

• 314.16

• 123.12

Tags

CCSS.7.G.B.4

What is the area of this semi circle? 

• 100.5 square cm

• 25.1  square cm

• 50.3 square cm

• 12.6 square cm

Tags

CCSS.7.G.B.4