Circles Diameter Radius

What is the name of the line that goes from one end of the circle to the other and crosses the center point?

• Area

• Diameter

• Circumference

• Radius

Find the area of the circle.

• 9π cm²

• 36π cm²

• 3π cm²

• 2.25π cm²

_{Find the Circumference.}

• 5π in

• 10π in

• 25π in

• 2.5π in

If the circumference of a circle is 28π, what is the radius of the circle?

• 28

• 14

• 56

• 196

What is the radius?

What is the diameter?

What is the diameter?

What is the perimeter of this semi circle?

• 3.6π m

• 7.2π m

• 14.4π

• 12.96π

What is the area of this semi-circle? Round to the nearest hundredth!

• 50.27 cm²

• 100.53 cm²

• 201.06 cm²

• 25.13 cm²

If the word problem is asking you to find the space inside the circle, which formula should you use?

• r = d/2

• d = 2r

• C = πd

• A = πr²