Triangle Sum Theorem

Front

70° + 70° + ? = 180°

Back

40°

Front

? + 90° + 50° = 180°

Back

40°

Front

? + 52° + 87° = 180°

Back

41°

Front

? + 38° + 90° = 180°

Back

52°

Front

43° + 84° + ? = 180°

Back

53°

Front

Back

H

Front

Find the missing congruent angles: 180° - 80°

Back

Front

Value of each missing contruent angle?

Back

40°

Front

Value of each missing contruent angle?

Back

70°

Front

Which set of angles would NOT make a triangle (not 180°)? Options: 30°, 70°, 80°; 40°, 30°, 110°; 80°, 20°, 60°; 50°, 60°, 70°

Back

80°, 20°, 60°