Grade 9 Angle Rules Worksheet

This worksheet covers fundamental angle rules including complementary, supplementary, vertically opposite, and angles on a straight line and around a point, suitable for Grade 9 mathematics.

Grade 9 Math GeometryAngle Rules

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Includes

Multiple ChoiceFill in the BlanksShort AnswerTrue / False

Standards

CCSS.MATH.CONTENT.8.G.A.5CCSS.MATH.CONTENT.7.G.B.5

Topics

MathGeometryAnglesGrade 9

6 sections · Free to use · Printable

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Grade 9 Angle Rules

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Date:

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Read each question carefully and answer to the best of your ability. Show all your working out where necessary.

1. Two angles are complementary if their sum is:

90°

180°

360°

45°

2. Vertically opposite angles are always:

Supplementary

Complementary

Equal

Acute

1. Angles on a straight line add up to degrees.

2. Angles around a point add up to degrees.

1. In the diagram below, find the value of x.

2. Two angles are supplementary. If one angle is 75°, what is the measure of the other angle?

1. If two lines intersect, the adjacent angles formed are always vertically opposite.

True

False

2. An acute angle and an obtuse angle can be complementary.

True

False