Parts of a Circle Diameter and Radius

Diameter 14 inches
Find the area of a circle.

• 615.44 in²

• 153.86 in²

• 43.96 in²

• 87.92 in²

Tags

CCSS.7.G.B.4

Which is the correct formula for the area of a circle?

• A = π r²

• A = 2π r²

• A=πd

• A=π d²

Tags

CCSS.7.G.B.4

Find the area of the circle.

• 803.84 cm²

• 25.12 cm²

• 50.24 cm²

• 200.96 cm²

Tags

CCSS.7.G.B.4

Find the area of the circle.

• 12.56 cm²

• 25.12 cm²

• 50.24 cm²

• 200.96 cm²

Tags

CCSS.7.G.B.4

Find the circumference of the circle.

• 14.13 cm

• 63.56 cm

• 28.26 cm

• 127.17 cm

Tags

CCSS.7.G.B.4

If the radius of a circle is 12.5 meters, the diameter is ____

• 6.25 meters

• 125 meters

• 25 meters

• 50 meters

Tags

CCSS.7.G.B.4

If the diameter of a circle is 50 yards, the radius is _____

• 100 yards

• 25 yards

• 150 yards

• 15 yards

Tags

CCSS.7.G.B.4

Ahmed measured the diameter (d) and circumference (C) of a circle accurately to the nearest mm, with the results:

d = 113 mm
C = 355 mm

He then used his measurements to calculate a value for π correct to 7 decimal places. What value did he get?

• 3.1415926

• 3.1415927

• 3.1415928

• 3.1415929

Tags

CCSS.2.MD.A.2

Determine the radius of the penny

• 59.66 mm

• 9.5 mm

• 38 mm

• 119.32 mm

Tags

CCSS.7.G.B.4

The radius of a circle is

• The measurement from the center of a circle to an edge of the circle.

• The measurement around the circle

• The measurement from and edge of the circle to another edge through the center

• A line perpendicular to the diameter of the circle