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.
Includes
Standards
Topics
Grade 9 Angle Rules
Name:
Date:
Score:
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
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