Geometric Circle Parts

Find the area of the circle with radius 3 cm.

• 37.70 cm²
• 113.10 cm²
• 18.85 cm²
• 28.27 cm²

What is the diameter?

• 5 in
• 10 in
• 5π in
• 10π in

What is the radius of this circle?

• 18
• 9
• 18π
• 9π

Find the area of the circle

• 43.96 u²
• 153.94 u²
• 483.61 u²
• 21.99 u²

What is the area of this circle?

• 15393.80 mi²
• 219.91 mi²
• 109.96 mi²
• 3848.45 mi²

What is the formula for area of a circle given the radius?

• A = πr
• A = 2πr
• A = πd
• A = πr²

A circle has an circumference of 18π cm. Find the area.

• 1017.88 cm²
• 254.47 cm²
• 28.27 cm²
• 56.55 cm²

Find the area of the shaded sector of circle O.  The radius is 6 inches and the central angle is 100°.  

• 10.5 sq. in.
• 113.1 sq. in.
• 31.4 sq. in.
• 125.7 sq. in.

Find the area of the sector.

• 52.4 in²
• 261.8 in²
• 5.2 in²
• 314.2 in²

Find the area of the sector.

• 7.9 m²
• 16.5 m²
• 3.75 m²
• 11.8 m²