Grade 7 Unlimited Math Practice: Area and Circumference

If the radius of a circle is 7, what is the circumference?

$14\pi$

$7\pi$

$28\pi$

$49\pi$

If the diameter of a circle is 6, what is the area?

$9\pi$

$3\pi$

$2.25\pi$

$12\pi$

If the diameter of a circle is 18, what is the area?

$4.5\pi$

$20.25\pi$

$81\pi$

$36\pi$

If the diameter of a circle is 24, what is the area?

$36\pi$

$48\pi$

$144\pi$

$6\pi$

If the diameter of a circle is 4, what is the circumference?

$2\pi$

$1\pi$

$8\pi$

$4\pi$