7th Grade Unit 4, Part 1 Angles and Circles

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• 5.5 inches

• 11.0 inches

• 22.0 inches

• 38.5 inches

Groups:

(a) Supplementary Angles

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(b) Complementary Angles

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(c) Vertical Angles

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(d) Adjacent Angles

• Angle 1 and Angle 5

• Angle 2 and Angle 3

• Angle 4 and Angle 5

• Angle 1 and Angle 3

• Angle 1 and Angle 2

• Angle 3 and Angle 4

Groups:

(a) True

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(b) False

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The intersection of three lines at one point and the measures of three angles are shown in this figure. Which equation can be solved to find the value of x in this diagram?

• 2x + 71 = 180

• 2x + 71 = 90

• x - 5 = 76 + x

• 2x - 5 = 76

Mathematical Equivalence

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Caroline measured the circumference of a circle. Put the steps below in order to help Caroline find the area of the circle.

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Sarah is solving for x in the figure shown. She got 20 degrees as her answer. She knows this because two angles are complementary when two sides of two adjacent angles are what?

• Parallel

• Perpendicular

• Diagonal

• Straight