8th Grade Angles in Triangles Worksheets
Ages 13-14 · Free previews · Print-ready PDFs
Written by Adi Ackerman, Head Teacher
The three interior angles of a triangle always add up to 180°, and an exterior angle equals the sum of the two remote interior angles. There are 8 sheets for 8th grade here, each with an answer key. Why Triangle Angles Sum to 180 Degrees uses a parallel line to show the fact, Triangle Angle Sum, Find the Missing Angle and Exterior Angle of a Triangle, Find the Measure practice it with numbers, and later sheets solve for x and chain angle facts. All eight practice 8.G.A.5.
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