Circles Introduction

What is the radius of a circle with a diameter of 20.5 inches?

What is the circumference of the circle below?

What is the area of the circle below?

The circumference of a circle is approximately 25.12 centimeters.

Click on the circle below with a circumference of 36.4 inches and an area of 105.7 square inches.

The length of one side of this square is 10 centimeters. What is true and what is false about this image?

Jacques was asked to find the arc length of this semicircle. He made an error. Click on the step where he makes his first error.

Shiloh has shaded in 1/4 of the circle below. Which of the following statements about this circle are true?

Kim claims that the net below will create the cylinder to its right. Do you support Kim's claim? Why or why not?

Dasha claims that the area of the orange circle is twice as large as the area of the green circle. Do you support Dasha's claim? Explain.