Grade 8 Angle Relationships Worksheet
Explore and identify various angle relationships including complementary, supplementary, vertical, and corresponding angles with this Grade 8 math worksheet.
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Grade 8 Angle Relationships
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Read each question carefully and answer to the best of your ability. Show all your work where applicable.
1. What is the relationship between Angle 1 and Angle 2 in the diagram below?
Complementary
Supplementary
Vertical
Adjacent
2. If two angles are supplementary and one angle measures 75°, what is the measure of the other angle?
15°
90°
105°
180°
3. Two angles whose sum is 90° are called angles.
4. When two lines intersect, the angles opposite each other are called angles and they are always equal.
5. A linear pair consists of two angles that form a straight line.
6. In the diagram below, lines 'm' and 'n' are parallel and intersected by a transversal 't'. Identify a pair of corresponding angles and explain why they are corresponding.
7. If two angles are complementary and their measures are (2x + 10)° and (3x - 5)°, find the value of x.
8. All adjacent angles are also complementary angles.
True
False
9. Vertical angles are always congruent.
True
False
Match each angle relationship with its definition.
10. Complementary Angles
a. Angles that share a common vertex and a common side.
11. Supplementary Angles
b. Two angles whose sum is 90°.
12. Vertical Angles
c. Two angles whose sum is 180°.
13. Adjacent Angles
d. Opposite angles formed by the intersection of two lines.