Sector of Circles

what is the area of this semicircle with a diameter of 8 cm? Give answer in terms of π.

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What is the area of the yellow?

• 25π m²

• 5π m²

• 6.25π m²

• 1.25π m²

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

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

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 Circumference.}

• 5π in

• 10π in

• 25π in

• 2.5π in

Find the perimeter of the figure.  Use 3.14 for π!

• 20.57 in.

• 16 in.

• 28.57 in.

• 14.28 in.

What is the area of a quarter circle if the diameter is 14 cm?

• 12.25π cm²

• 49π cm²

• 14π cm²

• 3.5π cm²

The circumference of a flower garden is 24π yd. What is the area of the flower garden in terms of pi?

• 144π yd²

• 576 π yd²

• 452.16 yd²

• 1,808.64 yd²