Circles

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

Tags

CCSS.7.G.B.4

If the area of a circle is 25 π in² , then the diameter is?

• 10 in
• 5 in
• 25 in
• pi in

Tags

CCSS.7.G.B.4

If the circumference of a circle is 22π , what is the diameter?

• 22 ft
• 11 ft
• π ft
• 0 ft

Tags

CCSS.7.G.B.4

The _____ is the distance from the center to any point on the circle.

• diameter
• radius
• π
• center

Tags

CCSS.HSG.C.A.2

CCSS.HSG.CO.A.1

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

• diameter
• radius
• π
• center

Tags

CCSS.HSG.CO.A.1

Which segment is the diameter?

• AC
• BD
• LM
• CE

Tags

CCSS.HSG.C.A.2

Which segment is a radius?

• LM
• DC
• BD
• ML

Tags

CCSS.HSG.C.A.2

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

• 18π in²

• 9π in²

• 81π in²

Tags

CCSS.7.G.B.4

The diameter of the circle is 6 inches. What is the circumference? Leave in terms of π.

• 6π in

• 12π in

• 36π in

• 24π in

Tags

CCSS.7.G.B.4

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

• A = 25.12

• A = 56.12

• A = 16.5

Tags

CCSS.7.G.B.4