Circumference and Area Practice

What is the formula for Circumference?

• C = π×r²

• C = 2×π×r

Daniel wants to buy cookies for his friend. The
radius of a cookie is 5 inches. What is the cookie’s 
circumference?

• 10 in

• 2.5 in

• 15.7 in

• 31.4 in 

What is the area of this circle?

• 1256.64

• 31.41

• 314.16

• 123.12

The wheels on the bicycle are circles. The diameter of the large wheel is three times longer than the smaller wheel. How many times greater is the area of the larger circle than the area of the smaller circle?

• 3 time greater

• 6 times greater

• 9 times greater

• 12 times greater

The courtyard outside East Middle School is in the shape of a rectangle and half-circle. What is the circumference of the courtyard?

• 328.5 meters

• 407 meters

• 500 meters

• 7,850 meters

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

• 50.24 in.²

• 200.96 in²

• 12.56 in. ²

• 78.88 in^.2

Find the area of the circle

• 43.96

• 153.86 

• 87.82

• 307.72

Find the radius of a circle if the area is 254.5 cm²

• 3cm

• 9cm

• 12cm

• 14cm

Find the radius of a circle if the circumference is 37.7 cm

• 2cm

• 3cm

• 5cm

• 6cm

Find the circumference of a circle with a radius of 13.5 mm.

• 37.68mm

• 18.84mm

• 84.78 mm

• none of the above