Circumference and Area of Circles Pretest

what is the area of this semicircle ?

• 100.48cm²

• 80cm²

• 200.96cm²

• none of the above

what is the circumference of this circle ?

• 3.14 cm 

• 37.68 cm

• 24 cm

• 68.4 cm

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

Alex has trained his puppy, Popper, to jump through a ring. According to Alex's measurements and calculations, the ring has a diameter of 3.5 feet. What is the ring's circumference (use 3.14 for pi)?

• 11.32 ft

• 12.25 ft

• 10.99 ft

• 8.75 ft

Find the area of the circle

• 21.98 units²

• 153.86 units²

• 87.82 units²

• 615.44 units²

What is the area of a circle with the diameter of 10 cm ?

• 66 cm²

• 78.5 cm²

• 66.5 cm²

• 314 cm²

If the circumference of a circle is 69.08 ft, what is the DIAMETER?

• 22 ft

• 11 ft

• π ft

• 0 ft

If the circumference of a circle is 138.16 ft, what is the RADIUS?

• 22 ft

• 11ft

• π ft

• no ft

Which segment is a radius?

• LM

• DC

• BD

• ML

If my diameter is 19 inches, what is my radius?

• 38 inches

• 9.5 inches

• 59.66 inches

• 119.32 inches