Area and Perimeter of Circles in Terms of Pi

Randy’s circular garden has a radius of 1.5 feet. He wants to enclose the garden edging that costs $0.75 per foot. About how much will the edging cost? Use 3.14 for π!

• $9.42
• $7.07
• $3.53
• $4.71

Tags

CCSS.7.G.B.4

The homeowners association wants to enclose the playground in a fence. How much fencing is needed?
Is this question finding the area or the circumference?

• area
• circumference
• neither

Tags

CCSS.7.G.B.4

What is the area of the yellow?

• 25π m²
• 5π m²
• 6.25π m²
• 1.25π m²

Tags

CCSS.HSG.C.B.5

What is the radius of this circle?

• 18 in
• 36 in
• 9 in

Tags

CCSS.7.G.B.4

A ball has a circumference of 9.42 cm. What is the diameter?  Round to the nearest hundredth!

• 29.59 cm
• 4.71 cm
• 3 cm
• 18.84 cm

Tags

CCSS.7.G.B.4

 A glass stained window is shaped like a semicircle. The bottom edge of the window is 36 inches long. How much colored glass would you need to cover the stained window? Round to the nearest hundredth.

• 1017.36 in²
• 508.68 in²
• 56.52 in
• 113.04 in

Tags

CCSS.7.G.B.4

What is the name of the line that goes from one end of the circle to the other and crosses the center point?

• Area
• Diameter
• Circumference
• Radius

The radius is....

• a line that crosses through the center and touches each edge 
• the center point of a circle 
• a line from the center point to the edge of the circle
• an element in science

Find the area of the circle.

• 9π cm²
• 36π cm²
• 3π cm²
• 2.25π cm²

Tags

CCSS.7.G.B.4

_{Find the Circumference.}

• 5π in
• 10π in
• 25π in
• 2.5π in

Tags

CCSS.7.G.B.4