7th Grade - Chapter 8 Test

The distance across a circle through its center is called the _____.

• diameter

• radius

• π

• center

• area

If you are given the diameter, how can you calculate the radius?

• Multiply the diameter by 2
• Divide the diameter by 2
• Add 2 to the diameter
• Subtract 2 from the diameter

Tags

CCSS.7.G.B.4

Which segment is the Chord?

• AC

• BD

• LM

• CE

• BA

Find the area of the circle. Leave in terms of π.

• 18π in²

• 9π in²

• 81π in²

• 36π in²

• 4.5π in²

Find the area of the circle.

• 43.96 units²

• 153.86 units²

• 87.82 units²

• 307.72 units²

• 76.93 units²

Mrs. Wilson placed the welcome mat shown below on her front door step. What is the area of her welcome mat in square feet?

• A = 30.15 in²

• A = 25.12 in²

• A = 56.12 in²

• A = 16.5 in²

• A = 100.48 in²

What is the formula for circumference of a circle given the diameter?

• C = π r

• C = 2 π r

• C = π d

• C = 2 π d

• C = π d / 2

If the area of circle is 25 π , find the radius of the circle.

• 10 π

• 10

• 50

• 50 π

• 5

Which is the correct definition of a circle?

• set of points on a flat surface with every point equidistant from a given point called the center
•  a line segment connecting any two points on a circle
• a special chord that goes through the center of a circle
•  a line segment that extends between the center and the circle

A circle has an area of 200.96 mm². What is the diameter?

• 8 mm

• 16 mm

• 24 mm

• 4 mm

• 12 mm