Find Circumference and Area of Circles

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

• 3215.36 ft

• 100.48 ft

• 401.92 ft

Tags

CCSS.7.G.B.4

A company's logo was designed using circles of three 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?

Tags

CCSS.7.G.B.4

The head of a 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 the nail in square millimeters?

Tags

CCSS.7.G.B.4

A circle has a diameter of 7.6 feet. Which measurement is closest of 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

The diameter of circle X is 15 centimeters. The diameter of circle y is 20 centimeters.

Which measurement is closest to the difference between the circumference of circle x and the circumference of circle y in centimeters?

• 15.7 cm

• 7.85 cm

• 137 cm

• 31.4 cm

Tags

CCSS.7.G.B.4

The radius of a circle S is half the radius of circle L. The radius of circle L is 8 millimeters.

Which measurement is closest to the area of circle S in square millimeters.

Tags

CCSS.7.G.B.4

A sundial has a circular base with a diameter of 90 ft as shown in the diagram.

Which measurement is closest of the circular area of the base of the sundial in square feet?

Tags

CCSS.7.G.B.4

A circle has a radius of 4.5 centimeters. Which measurement is closest to the circumference of the circle in centimeters?

• 14.13 cm

• 28.26 cm

• 63.59 cm

• 56.52 cm

Tags

CCSS.7.G.B.4

• The ratio of the circumference of a circle to its diameter

• The ratio of the circumference of a circle to its radius

• The radius of a circle times 2 times 3.14

• The diameter of a circle times 2 times 3.14

Tags

CCSS.7.G.B.4

Tags

CCSS.7.G.B.4