Triangle Theorems

Use the Triangle Sum Theorem to find each missing angle measure. For the given triangle with angles 84° and 77°, find the measure of the angle marked as "x°".

• 45°
• 150°
• 19°
• 90°

Use the Triangle Sum Theorem to find each missing angle measure. For the given right triangle with one angle 28°, find the measure of the angle marked as "x°".

• 62°
• 90°
• 45°
• 180°

Use the Triangle Sum Theorem to find each missing angle measure. For the given triangle with angles labeled "(5x - 25)°" and "(3x + 7)°", find the measure of the angle marked as "x°".

Use the Triangle Sum Theorem to find each missing angle measure. For the given triangle find the angle labeled "(5x - 25)°" .

Use the Triangle Sum Theorem to find each missing angle measure. For the given triangle find the angle labeled "(3x + 7)°".

Use the Exterior Angle Theorem to find each missing angle measure. For the given triangle with an exterior angle of 143° and two interior angles 59° and 53°, find the measure of the angle marked as "x°".

• 68°

• 143°

• 59°

• 112°

Use the Exterior Angle Theorem to find each missing angle measure. For the given triangle with an exterior angle of 95° and one interior angle 82°, find the measure of the angle marked as "x°".

• 177°
• 90°
• 45°
• 129°

Use the Exterior Angle Theorem to find each missing angle measure. For the given triangle with an exterior angle of 95° and one interior angle 47°, find the measure of the angle marked as "x°".

• 48°

• 2.02°

• 4465°

• 142°

Use what you've learned about special angle pairs and triangles to find each missing angle measure. For the given diagram with angles 48°, 99°, and "x°", find the measure of the angle marked as "x°".

• 90°
• 120°
• 147°

• 75°

Use what you've learned about special angle pairs and triangles to find each missing angle measure. For the given diagram with angles 48°, 99°, and "z°", find the measure of the angle marked as "y°".

• y° = 60°
• y° = 48°

• y° = 90°
• y° = 147°