Grade 12 Angle Rules Worksheet
This worksheet covers advanced angle rules, including angles in polygons, circles, and parallel lines, suitable for Grade 12 mathematics students.
Includes
Standards
Topics
Grade 12 Angle Rules
Name:
Date:
Score:
Read each question carefully and answer to the best of your ability. Show all work where applicable.
1. In the diagram below, lines AB and CD are parallel. If ∠AEF = 65°, what is the measure of ∠EFD?
65°
115°
25°
180°
2. The sum of the interior angles of a pentagon is degrees.
3. An angle inscribed in a semicircle is always a angle.
4. Find the value of x in the following diagram where the lines are parallel. Explain your reasoning.
5. The exterior angle of a cyclic quadrilateral is equal to the interior opposite angle.
True
False
Match each angle rule with its definition or property.
6. Vertically opposite angles
a. Add up to 180°
7. Angles on a straight line
b. Are equal
8. Corresponding angles (parallel lines)
c. Are supplementary
9. A regular polygon has an interior angle of 144°. Calculate the number of sides of the polygon.
10. In the circle with center O, points A, B, C are on the circumference. If ∠AOC = 110°, find the measure of ∠ABC.
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