circumference and area of circles

Front

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

Back

9.5 inches

Front

If my radius is 10ft, what is my diameter?

Back

20ft

Front

What is the circumference of this circle? Options: 3.14 cm, 37.68 cm, 24 cm, 68.4 cm

Back

37.68 cm

Front

A circular swimming pool is 21 feet in diameter. How many feet around is the pool? Options: 10.5 ft, 42 ft, 65.94 ft, 131.95 ft

Back

65.94 ft

Front

What is the area of this circle? Options: 163.2, 15.3, 124.2, 113.1

Back

113.1

Front

A cruise ship has a large, circular window with a diameter of 8 meters. What is the window's area?

Back

50.27 m²

Front

Formula to find the space inside the circle?

Back

A = πr²

Front

Formula to find the distance around a circle?

Back

C = πd

Front

A clock face has a diameter of 10 inches. What is the approximate area of the clock face in square inches?

Back

78.5 in²

Front

Diameter: 4 m
Circumference:

Back

12.56