Circle review

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

Which segment is the diameter?

• AC
• BD
• LM
• CE

Which segment is a radius?

• LM
• DC
• BD
• ML

Which of the following names a radius?

• segment AC
• segment DB
• segment AB
• segement BC

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

A circle has a radius of 23 feet. What is the diameter of the circle?

• 23 feet

• 46 feet

• 1/2 feet

• none of the above

Tags

CCSS.7.G.B.4

find the area of the circle with radius 3 cm below.

• 100 cm²
• 225 cm²
• 9 cm²
• 28.26 cm²

Tags

CCSS.7.G.B.4

What does r represent in the formula:

A = π·r²

• circumference

• radius

• diameter

• squared

Tags

CCSS.7.G.B.4

What is the symbol for pi?

• #

• π

• &

• %

Tags

CCSS.HSG.GMD.A.1

What is the part of the circle highlighted in red called?

• semi-circle arc
• major arc
• minor arc
• sector