Circle Area, Circumference

Your Geometry teacher rents a fast car for the weekend. Her friend, a Physics teacher, uses a stopwatch to time how long it takes your teacher to make one complete revolution about the track. Is this question circumference or area?

• Circumference

• Area

What is the correct formula for the Area of a Circle? 

• A= π x d

• A = π x d²

• A= π x r²

What is the area of a circle that has a radius of 100 miles?

• 7,850 miles 

• 10,000 miles

• 31,400 miles

Find the area for a circle with a diameter of 8 feet. 

• 200.96 feet 

• 25.12 feet 

• 12.56 feet 

• 50.24 feet

What is the area of a circle with a radius of 14.4 meters?

• 651.1 meters

• 2604.44 meters

• 162.7 meters

If a Circle has a radius of 3 cm and a diameter of 6cm , what is the circumference of the circle? 

• 9.42 cm

• 18.84 cm

If a circle has a circumference of 26.69 yards, what is it's diameter?

• 8.5 yards

• 83.8 yards

• 4.2 yards

• 17.6 yards

If a circle has a diameter of 45 feet, what is its radius?

• 90 feet

• 22.5 feet

• 45 feet

• 180 feet

A circle has a radius of 150 mm. What is it's circumference? 

• 471 mm

• 942 mm

• 47.7 mm

Ms. Boyett wants to build a circular swimming pool with a fountain in the center. She wants the fountain to be 18.6 feet from the edge of the pool. What would the distance be around the outside of the pool? 

• 116.8 yards

• 58.4 feet

• 58.4 yards

• 116.8 feet