Area, circumference of circles and polygons

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

• A = π·d

• C = 2·π·r

• A = π·r²

• C = π·d

Tags

CCSS.7.G.B.4

What is the area of this circle?

• 163.2 square centimeters

• 15.3 square centimeters

• 124.2 square centimeters

• 113.1 square centimeters

What is the distance around a circle?

• Circumference
• Area
• Diameter
• Radius

Tags

CCSS.HSG.GMD.A.1

The diameter of a circle is 3 centimeters. What is the circumference?

• 11.5cm

• 9.42 cm

• 3 cm

• 45.3 cm

Daniel wants to buy cookies for her friend. The radius of a cookie is 5 inches. What is the cookie’s circumference?

• 10 in
• 2.5 in
• 15.7 in
• 31.4 in 

Tags

CCSS.7.G.B.4

What two formulas can you use to find the circumference?

• C = π·d

• C = π·r²

• C = 2·π·r

• C = d²

Tags

CCSS.7.G.B.4

Find the arc length. Leave your answer in terms of π.

• (7/4)π cm

• (7/2)π cm

• (1/8)π cm

• 45π cm

Alison is jogging on a circular track that has a radius of 140 feet. She runs along the track from point R to point N, a distance of 230 feet. Find to the nearest degree, the measure of minor arc RN.

• 47 feet

• 74 feet

• 94 feet

• 123 feet

A region bounded by two radii of the circle and their intercepted arc is a ....

• arc of a circle
• arc length of a circle
• sector of a circle
• segment of a circle

Tags

CCSS.HSG.C.B.5

Find the area of the shaded sector of circle O.  The radius is 6 inches and the central angle is 100°.  Express answer to the nearest tenth of a square inch.

• 9.2 sq. in.
• 10.5 sq. in.
• 31.4 sq. in.
• 38.2 sq. in.

Tags

CCSS.HSG.C.B.5