Circumference & Area of Circles 7.9B

The head of the nail is circular, as shown. The head of this nail has a diameter of 6 millimeters. Which measurement is closest to the area of the head of this nail in square millimeters?

• 9.42 mm²

• 113.04 mm²

• 28.26 mm²

• 37.68 mm²

Tags

CCSS.7.G.B.4

A circle has a diameter of 7.6 feet. Which measurement is closest to the circumference of the circle in feet?

• 23.9 ft

• 45.3 ft

• 47.7 ft

• 11.9 ft

Tags

CCSS.7.G.B.4

An observatory is shaped like a cylinder standing on one of its bases with a dome on top. The diameter of the floor of the observatory is 64 feet, as shown in the diagram. Which measurement is closest to the circumference of the base of the observatory in feet?

• 200.96 ft

• 3,215.36 ft

• 100.48 ft

• 401.92 ft

Tags

CCSS.7.G.B.4

A company's logo was designed using circles of 3 different sizes. The diameters of two of the circles are shown. Which measurement is closest to the area of the largest circle in square centimeters?

• 56.52 cm²

• 141.30 cm²

• 1,017.36 cm²

• 254.34 cm²

Tags

CCSS.7.G.B.4

A circular tablecloth has a radius of 2.5 feet. Kyle is sewing a piece of ribbon around the edge of the tablecloth. If Kyle has exactly enough ribbon, which measurement is closest to the length of the piece of ribbon in feet?

• 7.85 ft

• 15.7 ft

• 19.63 ft

• 31.4 ft

Tags

CCSS.7.G.B.4

A rotating lawn sprinkler sprays water in a circular area of grass, as shown in the picture, The diameter of the circular area of grass is 16 feet. Which measurement is closest to the area in square feet that this sprinkler sprays with water?

• 100.48 ft²

• 50.24 ft²

• 200.96 ft²

• 803.84 ft²

Tags

CCSS.7.G.B.4

A group of students stood in a circle to play a game. The circle had a diameter of 22 meters. Which measurement is closest to the circumference of the circle in meters?

• 34.54 m

• 1,519.76 m

• 379.94 m

• 69.08 m

Tags

CCSS.7.G.B.4

A circular railroad-crossing sign has a diameter of 30 inches. Which measurement is closest to the area of the sign in square inches?

• 94.2 in²

• 188.4 in²

• 706.5 in²

• 286.6 in²

Tags

CCSS.7.G.B.4

Jennifer painted a tabletop that is shaped like a circle. The circumference of the tabletop is  $6\pi$  feet.  Which measurement is closest to the area of the tabletop in square feet?

• 18.84 square feet

• 28.26 square feet

• 37.68 square feet

• 113.04 square feet

Tags

CCSS.7.G.B.4

The diagram below shows the radius of the circular opening of a drinking cup. Which of the following is closest to the circumference of the opening in centimeters?

• 12 cm

• 50 cm

• 25 cm

• 8 cm

Tags

CCSS.7.G.B.4