Unit 4 - Classwork Review #1

Find x and the measure of each angle. (Refer to the diagram)

• x = 10, angles: 20 degrees and 70 degrees
• x = 25, angles: 35 degrees and 55 degrees
• x = 21, angles: 25 degrees and 65 degrees
• x = 15, angles: 30 degrees and 50 degrees

Find the MEASURE of EACH angle. (Refer to the diagram)

• 180 degrees and 0 degrees
• 90 degrees and 45 degrees
• 120 degrees and 60 degrees
• 144 degrees and 36 degrees

Find the value of x. (Refer to the diagram)

• 90
• 45
• 60
• 43

Given that ∠DPB has a measure of (x+31)° and ∠BPC has a measure of (4x-6)°, what is the measure of ∠BPC?

• 102°

• 108°

• 118°

• 124°

Estimate the measure of the angle. (Refer to the diagram)

• 120 degrees
• 45 degrees
• 90 degrees
• 180 degrees

A circle is divided into 10 equal parts. Determine the measure of each angle.

• 36

• 40°

• 50°

• 55°

Given the diagram below, what is the measure of each angle in degrees?

• 30

• 45

• 60

• 90

A round fish pond has a radius of 10 feet with a fence that is 4 feet away from the pond at all points. What is the circumference of the fence?

• 28π feet

• 14π feet

• 20π feet

• 34π feet

Find the area of the circle with a radius of 4.5 cm. Give your answer in terms of pi.

• 20.25π

• 9π

• 81π

• 12.25π

What is the diameter of a circle given that the circumference of the circle is 78.5 cm? Choose the correct option.

• 12.5 cm

• 25 cm

• 39.25 cm

• 50 cm