Chapter 8: Area/Circumference review

Is the red line a radius or diameter of the circle?

• Radius
• Diameter

Tags

CCSS.HSG.C.A.2

What is the radius of this circle?

• 18in
• 36in
• 9in
• 8in

Tags

CCSS.7.G.B.4

What is the formula for area of a circle?

•  $A=\pi r^2$

• $A=2\pi r$

A line that goes from one end of the circle to the other and crosses the center point.  

• center
• diameter
• dime eater
• radius

Tags

CCSS.HSG.C.A.2

CCSS.HSG.CO.A.1

What is the formulas (there are 2) for Circumference?

•  $C=\pi r^2$  

•  $C=\pi d$  

•  $C=\pi d^2$  

•  $C=2\pi r$  

What is the diameter of this circle?

• 3.5 m
• 3 m
• 5 m
• 7 m

Tags

CCSS.7.G.B.4

What is the circumference of this circle ?

• 3.14 cm 
• 37.68 cm
• 24 cm
• 68.4 cm

Tags

CCSS.7.G.B.4

Find the area of the circle below.

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

Tags

CCSS.7.G.B.4

Find the circumference (to the nearest whole number- this means NO DECIMALS)

• 88 in

• 44 in

• 116 square in

• None of the above

what is the area of this semicircle ?
d = 8 cm 

• 100.48 cm²
• 80 cm²
• 200.96 cm²
• 25.12 cm²

Tags

CCSS.7.G.B.4