Area and Circumference and Perimeter of Circles

what is the area of a circle with the diameter of 16 cm ?

• 66 cm

• 200.96 cm

• 66.5 cm

• 10 m

A circular swimming pool is 21 feet in diameter.
How many feet around is the pool?

• 10.5 ft

• 42 ft

• 65.94 ft

• 131.95 ft

What is the area of the yellow?

• 78.5 mi²

• 19.625 mi²

• 39.25 mi²

• 31.4 mi²

A bicycle tire has a diameter of 27 inches. What is the closest to the distance the bike travels along the ground when the wheel rotates once?

• 85

• 15.5

• 42

• 13

If my circumference is 37.68cm, what is my diameter?

• 12cm

• 118.3152cm

• 6cm

• 37.68cm

What is the perimeter of the semi-circle?

• 11 yd

• 17.27 yd

• 34.54 yd

• 28.27 yd

Jayne has a very large circular lollipop that has a circumference of 25.12 inches. What would the diameter of Jayne’s lollipop be? Use π = 3.14.

• 4 in.

• 8 in.

• 12 in.

• 16 in.

If my circumference is 37.68cm, what is my diameter?

• 12cm

• 118.3152cm

• 6cm

• 37.68cm

Find the perimeter

• 14 m

• 43.96m

• 176 m

• 191.96 m

Find the perimeter of the figure.  Use 3.14 for pi.

• 20.56 in.

• 17.3 in.

• 17.8 in.

• 31.88 in.