Finding Area and Circumference with Pi in Answer

Lily is making party favors by placing a circular disk in the bottom of a plastic bag. Each disk has a diameter of 6 centimeters. What is the area of the disk to the nearest hundredth of square centimeter?

Use 3.14 for 𝜋.

• 18.84 cm²

• 28.26 cm²

• 91.06 cm²

• 113.04 cm²

Tags

CCSS.7.G.B.4

The circumference of the wheel on Roy's bicycle is 225 in. What would you do to determine the radius of the wheel?

• Divide the circumference by 𝜋.

• Divide the circumference by 𝜋 to find the diameter; then divide the diameter by 2 to find the radius.

• Multiply the circumference by 𝜋.

• Multiply the circumference by 𝜋 to find the diameter; then divide the diameter by 2 to find the radius.

Tags

CCSS.7.G.B.4

Jayne has a very large circular lollipop that has a circumference of 25.12 inches. What would the area of Jayne’s lollipop be?

• 50.24 in.²

• 200.96 in²

• 12.56 in. ²

• 78.88 in^.2

Tags

CCSS.7.G.B.4

Find the area of the figure shown.

• 1017.36 cm

• 254.34 cm

• 26.52 cm

• 123.65 cm

Tags

CCSS.HSG.C.B.5

A glass stained window is shaped like a semicircle. The bottom edge of the window is 36 inches long. How much colored glass would you need to cover the stained window? Round to the nearest hundredth. (please label - sq inches or sq in)

Tags

CCSS.7.G.B.4

A circular track with a diameter of 60 meters is shown. Shaleah walked around the track 4 times. Approximately how many meters did she walk?

• 377

• 2826

• 754

• 11,304

Tags

CCSS.7.G.B.4

Mrs. Wilson placed the welcome mat shown below on her front door step. What is the area of her welcome mat in square feet? Round to the nearest tenth.

• A = 36.4 in sq

• A = 50.2 in sq

• A = 31.4 in sq

• A = 25.1 in sq

Tags

CCSS.7.G.B.4

The area of the circle would be found using which of the following formulas...  (9 cm is the radius)

• Area = π(4.5)²

• Area = π(9)²

• Area = π(18)²

• None of these

Tags

CCSS.7.G.B.4

What is the area of this circle? Use the pi function on the calculator. Round your answer to two decimal places.

• 82.13

• 78.54

• 314.16

• 170.12

Tags

CCSS.7.G.B.4

The perimeter of a circle is usually called the...

• radius

• diameter

• circumference

• area