7th Grade Geometry Vocab

Front

One triangle with specific side lengths

Back

Unique Triangle

Front

Triangles can form from angle measures summing to 180°.

Back

Ambiguous Triangle

Front

No triangle can be formed with the given side lengths or angles exceeding 180°.

Back

Non-existent Triangle

Front

Angles sharing a common side and vertex.

Back

Adjacent Angles

Front

Angles that sum to 90°

Back

Complementary Angles

Front

Angles that sum to 180°

Back

Supplementary Angles

Front

Non-adjacent angles formed by two intersecting lines across from each other.

Back

Vertical Angles

Front

Same size, length, measure, equal

Back

Congruent

Front

Triangles with 3 congruent sides.

Back

Equilateral Triangle

Front

Triangles with 2 congruent sides.

Back

Isosceles Triangle