Applying the Understanding of the Area of a Circle to Solve Problems

Oil spilled from a tanker spreads in a circle whose circumference increases at a rate of 40 ft/sec. How fast is the area of the spill increasing when the circumference of the circle is 100π ft? What equation(s) should be used?

The circumference of a circular patio is 53.38 feet. What is the area of the​ patio? Use 3.14 for an approximation for π.

• 17

• 8.5

• 72.25

• 226.9

Tags

CCSS.7.G.B.4

A circle has a circumference of 56.52 cm. Find the area of the circle.

• 351.7 cm²

• 1234.5 cm²

• 1017.36 cm²

• 254.34 cm²

Tags

CCSS.7.G.B.4

A circle has a circumference of 18π feet. What is its area?

• 81π ft²

• 18π ft²

• 9π ft²

• 36π ft²

Tags

CCSS.7.G.B.4

How many cookies are there?

• 48 cookies

• 24 cookies

• 8 cookies

• 4 cookies

Tags

CCSS.4.MD.A.2

Find the circumference of a circle with an area of 1,809.56 square centimeters.

• 260,577 cm

• 150.8 cm

• 75.4 cm

• 473.8 cm

Tags

CCSS.7.G.B.4

The circumference of a circle is 28.26 cm. What is closest to the area of the circle.

• 254.34 cm²

• 14.13 cm²

• 63.6 cm²

Tags

CCSS.7.G.B.4

A circle has an area of 36π cm². What is the circumference of the circle?

• C= 18π cm

• C= 12π cm

• C= 6π cm

• C= 36π cm

Tags

CCSS.7.G.B.4

If a circle's circumference is 18.84, what is the area of that circle?

• 3 cm²

• 6 cm²

• 9.42 cm²

• 28.26 cm²

Tags

7.9.B

Find the area of a circle with a circumference of 53.41 inches.

Tags

CCSS.7.G.B.4