Calculate Interior Angles from Exterior Angles in Triangles

A triangle has one exterior angle measuring 120 degrees. If one of the interior angles is 50 degrees, what is the measure of the other interior angle?

• 70 degrees

• 80 degrees

• 60 degrees

• 90 degrees

Tags

CCSS.8.G.A.5

In a triangle, the exterior angle is 135 degrees. If one of the interior angles is 45 degrees, what is the measure of the other interior angle?

• 75 degrees

• 90 degrees

• 60 degrees

• 120 degrees

Tags

CCSS.8.G.A.5

A park is designed in the shape of a triangle. One of the exterior angles at a corner of the park is 110 degrees. If the adjacent interior angle is 70 degrees, what is the measure of the other interior angle?

• 30 degrees

• 50 degrees

• 60 degrees

• 40 degrees

Tags

CCSS.8.G.A.5

During a construction project, an exterior angle of a triangular support beam measures 150 degrees. If one of the interior angles is 30 degrees, what is the measure of the other interior angle?

• 120 degrees

• 90 degrees

• 150 degrees

• 60 degrees

Tags

CCSS.8.G.A.5

A triangular garden has an exterior angle of 100 degrees. If one of the interior angles is 40 degrees, what is the measure of the remaining interior angle?

• 50 degrees

• 70 degrees

• 80 degrees

• 60 degrees

Tags

CCSS.8.G.A.5

In a triangular sign, one exterior angle measures 160 degrees. If one of the interior angles is 20 degrees, what is the measure of the other interior angle?

• 180 degrees

• 140 degrees

• 100 degrees

• 60 degrees

Tags

CCSS.8.G.A.5

A triangular roof has an exterior angle of 130 degrees. If one of the interior angles is 50 degrees, what is the measure of the other interior angle?

• 100 degrees

• 80 degrees

• 70 degrees

• 90 degrees

Tags

CCSS.8.G.A.5

A triangular piece of land has an exterior angle of 140 degrees. If one of the interior angles is 60 degrees, what is the measure of the remaining interior angle?

• 90 degrees

• 100 degrees

• 70 degrees

• 80 degrees

Tags

CCSS.8.G.A.5

In a triangle, the exterior angle is 125 degrees. If one of the interior angles is 55 degrees, what is the measure of the other interior angle?

• 60 degrees

• 70 degrees

• 80 degrees

• 90 degrees

Tags

CCSS.8.G.A.5

A triangular art installation has an exterior angle measuring 115 degrees. If one of the interior angles is 45 degrees, what is the measure of the other interior angle?

• 90 degrees

• 70 degrees

• 60 degrees

• 80 degrees

Tags

CCSS.8.G.A.5