Circles Overview

Which expression is used to solve the area of this circle?

• A = (2)π(8)²

• A = π(8)²

• A =2²

• A = π(2)(8)

Tags

CCSS.7.G.B.4

Which expression can you use to solve the area of this circle?

• A = 2π24

• A = π24

• A = π24²

• A = 24π²

Tags

CCSS.7.G.B.4

Mrs. Perez wants to put fencing around her circular garden. About how many feet of fencing will she need if the diameter of her garden is 14 feet?

• 44 feet

• 22 feet

• 88 feet

• 111 feet

Tags

CCSS.7.G.B.4

Mr. Davis has a circular hot tub that is decorated only around the edges. The radius of the hot tub is 5 feet. How many feet has decoration on it?

• 78.5 feet

• 7.85 feet

• 15.7 feet

• 31.4 feet

Tags

CCSS.7.G.B.4

Which of the following statement(s) are true about the picture?

I. The radius of the circle is 4 units.

II. The diameter of the circle is 4 units.

III. The circumference of the circle is the distance around a circle.

IV. The ratio of the circumference to the circle’s diameter is 3.14.

• II & IV

• I, II, & III

• I, III, & IV

• I & III

If I have a beach ball with a diameter of 8 inches, what is my total area?

• 50.24 in²

• 25.12 in²

• 200.96 in²

• 12.56in²

Tags

CCSS.7.G.B.4

A circle has a diameter of 5.6 cm. What is the circumference to the nearest cm?

• about 2 cm

• about 9 cm

• about 18 cm

• about 176 cm

Tags

CCSS.7.G.B.4

The semi-circle pictured is going to be re-covered with glass. How many feet of glass is needed to cover the entire surface?

• 56.52 square feet

• 7.065 square feet

• 14.13 square feet

• 28.26 square feet

Tags

CCSS.7.G.B.4

The circumference of the circle shown is 120 mm. What is the radius?

• r = 38.2 mm

• r = 19.1 mm

• r = 376.8 mm

• r = 60 mm

Tags

CCSS.7.G.B.4

The circumference of the circle shown is 9 yd. What is the radius?

• 1.4 yd

• 2.9 yd

• 28 yd

• 14 yd

Tags

CCSS.7.G.B.4