Area & Circumference of Circles

What is the diameter?

• 5 in
• 10 in
• 3.14 in
• 15.84 in

A DVD has a diameter of 15 millimeters. Which equation would help you determine the area?

• A = 15²π

• A = 2π15

• A = 7.5²π

• A = 15 π

A circle has a radius of 5 cm. What is the area?

• 78.5 cm²

• 31.4 cm²

• 15.7 cm²

• 314 cm²

The diameter of a quarter is 24.26 mm. What is closest to the circumference of the outer edge of the quarter? Use 3.14 for Pi.

• 76.18 mm

• 38.01 mm

• 463 mm

• 1,848 mm

Tags

CCSS.HSG.GMD.A.1

The diameter of the wheel on a bicycle is 24 inches. Which is closest to the circumference of the wheel?

• 25.36 in

• 37.68 in

• 75.36 in

• 452.16 in

Tags

CCSS.HSG.GMD.A.1

The radius of this pizza is 9 ½ in. What is the approximate area of the pizza?

• 81 in²

• 29.83 in²

• 59 ⅔ in²

• 283 ½ in²

Tags

CCSS.HSG.GMD.A.1

The circumference of a circle is 37.68 yds. What is the diameter? Use 3.14 for Pi.

• 118.3 yds

• 6 yds

• 12 yds

• 59.5 yds

The circumference of a circle is 28.26 cm. What is closest to the area of the circle.

• 254.34 cm²

• 14.13 cm²

• 63.6 cm²

What is the diameter of circle with a radius of 6?

• 12

• 36

• 2 times 3

• 42

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

• A = πd

• A = 2πr

• A = πr²

• A = xyz

Tags

CCSS.HSG.GMD.A.1