Geometry Part 2 Review

Geometry Part 2 Review

Multiple Select

#1

What is the formula to find the CIRCUMFERENCE of a circle?

(Can be more than one answer.)

• C = $$\frac{\pi d}{2}+d$$   

• C = $$2\pi r$$  

• C = $$\pi r^2$$    

• C = $$\pi d$$  

Multiple Choice

What is the formula to find the PERIMETER of a semicircle?

• P = $$\frac{\pi d}{2}+d$$  

• P = $$2\pi r$$  

• P = $$\pi r^2$$  

• P = $$\pi d$$  

Multiple Choice

#2

What is the formula to find the AREA of a circle?

• A = $$2\pi r$$  

• A = $$\pi d$$  

• A = $$\pi r^2$$  

• A = $$2\pi^2$$  

To find the diameter of a circle given its circumference, you do:

CIRCUMFERENCE ÷​ PI

We can solve for any part of a formula.

Instead of using the CIRCUMFERENCE formula to solve for the circumference, we can use it to find the diameter. ​

#4 & 5

​For #6, we need to use the Perimeter and Area formula for this half circle.

Write down the formulas on your paper before you start. ​

Multiple Choice

#6a

Find the PERIMETER of this semicircle.

Use 3.14 for pi.

• 8.28 ft.

• 1.57 ft.

• 3.14 ft.

• 5.14 ft.

Multiple Choice

#6b

Find the AREA of this semicircle.

Use 3.14 for pi.

• 8.28 ft. sq.

• 1.57 ft. sq.

• 3.14 ft. sq.

• 5.14 ft. sq.

Draw

Draw and label the diameter and radius of the small circle with the correct lengths.

​Take some time right now to set up #8 as shown with this picture.

1. Write down the area formula on your paper

2. Plug in the radius for each circle

3. Find the area of each circle

4. Subtract​

#8

​

Multiple Choice

#8

Find the area of the shaded region. Use 3.14 for pi.

• 3077.19 cm. sq.

• 2461.76 cm. sq.

• 1846.32 cm. sq.

• 43.96 cm. sq.

Draw

Find and fill in the missing side length and then find the base length of the triangle.

Multiple Choice

#9a

Find the PERIMETER of the composite figure.

• 46 cm.

• 48 cm.

• 54 cm.

• 56 cm.

Multiple Choice

#9a

Find the AREA of the composite figure.

• 114 cm. sq.

• 127.5 cm. sq.

• 138 cm. sq.

• 150 cm. sq.

Multiple Choice

#10

Find the AREA of this section of a circle. Use 3.14 for pi.

• 10.205 cm. sq.

• 40.82 cm. sq.

• 132.665 cm. sq.

• 530.66 cm. sq.

Multiple Choice

#11

Find the AREA of this section of a circle. Use 3.14 for pi.

• 50.24 in. sq.

• 9.42 in. sq.

• 66.9 in. sq.

• 37.68 in. sq.

Multiple Choice

#1 (last page)

What is the AREA of a circle whose radius measures 9.5 inches? Use 3.14 and round to the nearest tenth.

• 20.4 sq. in.

• 40.8 sq. in.

• 132.7 sq. in.

• 283.4 sq. in.

Multiple Choice

• 38.5 sq. ft.

• 22 sq. ft.

• 44 sq. ft.

• 77 sq. ft.

Multiple Choice

• 56 sq. in.

• 112 sq. in.

• 126 sq. in.

• 144 sq. in.

Open Ended

If you can find this problem somewhere in your math stuff already, just type in the answer. If you can't, solve it and type in your answer.

Poll

I predict I will score a ___ on tomorrows test.

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