Grade 8 Angle Sums Worksheet
This worksheet focuses on understanding and applying angle sum properties in triangles and quadrilaterals for Grade 8 students.
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Grade 8 Angle Sums
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Date:
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Read each question carefully and answer to the best of your ability. Show all your work for full credit.
1. What is the sum of the interior angles of a triangle?
90 degrees
180 degrees
270 degrees
360 degrees
2. Find the measure of the missing angle x in the triangle below.
3. The sum of the interior angles of a quadrilateral is degrees.
4. If two angles of a triangle measure 45° and 75°, the third angle measures degrees.
5. A quadrilateral has three angles measuring 80°, 100°, and 95°. What is the measure of the fourth angle?
6. An equilateral triangle has three angles, each measuring 60 degrees.
True
False
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