area and circumference of circles

Front

Is the red line a radius or diameter of the circle?

Back

Radius

Front

Is the red line a radius or diameter of the circle?

Back

Diameter

Front

What is circumference?

Back

The distance around a circle.

Front

A DVD has a diameter of 15 millimeters. Which equation would help you determine the circumference? Options: c = 15π, c = 2π15, c = π(15²), c = π(7.5²)

Back

c = 15π

Front

Equation to find fabric amount for a table with 5 ft diameter.

Back

A = π2.5²

Front

A ball has a circumference of 9.42 cm. What is the diameter?

Back

3 cm

Front

A Ferris wheel has a diameter of 80 meters. How far does a rider travel in three complete rotations?

Back

753.6 meters

Front

What is the distance around a bowl with a diameter of 14 cm?

Back

43.98 cm

Front

What is the formula for area of a circle?

Back

A = π×r²

Front

What is the formula for area of a circle?

Back

A = pi x r2