Area of a circle

What is the formula for finding the area of a circle?

• A = π·d

• C = 2·π·r

• A = π·r²

• C = π·d

find the area of the circle below.

• 100 cm
• 225 cm
• 9 cm
• 28.26 cm

Tags

CCSS.7.G.B.4

What is the area of a circle with a radius of 21 cm?

• 1384.74 cm²
• 2142.12 cm²
• 4348.08 cm²
• 1289.12 cm²

Tags

CCSS.7.G.B.4

What is the area of this circle?

• 6082.12
• 1520.53
• 1893.14
• 1292.92

Tags

CCSS.HSG.GMD.A.1

What is the area of this circle?

• 163.2
• 15.3
• 124.2
• 113.1

Tags

CCSS.HSG.GMD.A.1

What is the area of this circle?

• 15393.8
• 1248.12
• 5930.12
• 3848.45

Tags

CCSS.HSG.GMD.A.1

A cruise ship has a large, circular window. It has a diameter of 8 meters. What is the window's area?

• 31.25 m²

• 29.55 m²

• 30.36 m²

• 50.27 m²

Tags

CCSS.HSG.GMD.A.1

Ms. Catall is using a compass to find her way out of the woods. The compass has a radius of 4 centimeters. What is the compass's area?

• 49.2 cm²
• 45.6 cm²
• 50.24 cm²
• 55.9 cm²

Tags

CCSS.HSG.GMD.A.1

Find the area of the circle.

• 18.84 m²

• 113.04 m²

• 37.68 m²

• 452.16 m²

Find the area of the circle.

• 12.56 cm²

• 25.12 cm²

• 50.24 cm²

• 200.96 cm²