area and circumference of circles

Front

What is the formula for area of a circle?

Back

A = pi x r2

Front

What is the radius of this circle? Options: 12, 6, 24

Back

6

Front

What is the area of this circle?

Back

1385.44

Front

Find the area of the circle, round to nearest tenth:
r = 15 cm

Back

706.5 cm²

Front

Find the area of the circle, round to nearest tenth:
r = 18 yd

Back

1017.4 yd²

Front

Find the area of the circle, round to nearest tenth:
d = 4 in

Back

12.6 in²

Front

Diameter

Back

distance across the circle through the center

Front

Radius

Back

Distance from the center to any point on the circle

Front

What is the formula for finding radius?

Back

r = d/2

Front

What is the formula for finding the area of a circle?

Back

A = π r²