Relating Area and Circumference

What is the formula for area of a circle?

• C=πd
• C=πd²
• A=πr²
• A= C/d

Tags

CCSS.7.G.B.4

What is the area of the circle in terms of pi?

• 5π cm²

• 25π cm²

• 10π cm²

• 15.7π cm²

What is the circumference of a circle with a radius of 5 in terms of π ?

• 5 π square units
• 10 π square units
• 25 π square units
• 50 π square units

Tags

CCSS.7.G.B.4

Find the area of the circle with a radius of 11, leave your answer in terms of π.

• 121π cm²

• 22π cm²

• 484π cm²

• 121π m²

Find the Circumference for a Circle with a radius of 9. Leave your answer in terms of pi.

• 4.5π

• 81π

• 12π

• 18π

Find Circumference. Leave answer in terms of pi (π).

• 36π

• 9π

• 4.5π

• 18π

Tags

CCSS.7.G.B.4

Find the area of the circle in terms of π

• $4\pi\ m^2$

• $16\pi\ m^2$

• $2\pi\ m^2$

• $8\pi\ m^2$

Tags

CCSS.7.G.B.4

A cruise ship has a large, circular window. It has a circumference of 18.84 meters. What is the window's area?

• 31.25 m²

• 29.55 m²

• 30.36 m²

• 28.26 m²

Ms. Catall is using a compass to find her way out of the woods. The compass has a circumference of 25.12 centimeters. What is the compass's area?

• 49.2 cm²

• 45.6 cm²

• 50.24 cm²

• 55.9 cm²

The largest cookie ever baked measured a circumference of 320.28 feet. Which of these is closest to the area of the cookie?

• 2601 ft²

• 8167 ft²

• 2042 ft²

• 162 ft²