Area and Circumference of a Circle

Is the line drawn a radius or a diameter?

Is the line drawn a radius or a diameter?

Is the line drawn a radius or a diameter?

Is the line drawn a radius or a diameter?

Is the line drawn a radius or a diameter?

Which statement(s) are true about the circle shown?

Check all that apply.

Which statement(s) are true about the circle shown?

Check all that apply.

What is the circumference of the circle shown?

$$C=\pi d$$

$$C=2\pi r$$

Express your answer in terms of $$\pi$$ .

What is the circumference of the circle shown?

$$C=\pi d$$

$$C=2\pi r$$

Express your answer in terms of $$\pi$$ .

What is the area of the circle shown?

$$A=\pi r^2$$

Express your answer in terms of $$\pi$$ .

What is the area of the circle shown?

$$A=\pi r^2$$

Express your answer in terms of $$\pi$$ .

The formula for the area of a circle is A = πr². If the area is 121π cm², what is the diameter?