Exploring Angles in Triangles

What is the sum of the interior angles in a triangle?

• 360 degrees

• 270 degrees

• 180 degrees

• 90 degrees

Tags

CCSS.8.G.A.5

If one angle in a triangle is 90 degrees and another is 23 degrees, what is the third angle?

• 90 degrees

• 77 degrees

• 70 degrees

• 67 degrees

Tags

CCSS.8.G.A.5

How do you find the value of an unknown angle in a triangle?

• Multiply the known angles by 2

• Subtract the known angles from 180 degrees

• Add the known angles and divide by 2

• Subtract the known angles from 90 degrees

Tags

CCSS.8.G.A.5

If a triangle has two angles measuring X degrees each, and the third angle is 23 degrees, what is the value of X?

• 77 degrees

• 78.5 degrees

• 80 degrees

• 79 degrees

Tags

CCSS.8.G.A.5

What is the relationship between an exterior angle and its adjacent interior angle?

• There is no specific relationship

• They are complementary

• They are supplementary

• They are equal

Tags

CCSS.8.G.A.5

What is the sum of the exterior angles in a triangle?

• 360 degrees

• 270 degrees

• 180 degrees

• 90 degrees

What is the sum of two non-adjacent interior angles equal to?

• The exterior angle

• The adjacent interior angle

• 180 degrees

• The sum of all interior angles

Tags

CCSS.8.G.A.5

If two interior angles of a triangle are 50 and 70 degrees, what is the measure of the exterior angle not adjacent to them?

• 130 degrees

• 120 degrees

• 60 degrees

• 140 degrees

Tags

CCSS.8.G.A.5

How can you find an unknown non-adjacent interior angle if you know the exterior angle?

• Add 180 to the exterior angle

• Subtract the exterior angle from 360

• Subtract the known interior angle from the exterior angle

• Add the known interior angle to the exterior angle

Tags

CCSS.8.G.A.5

If an exterior angle measures 70 degrees and one non-adjacent interior angle measures 30 degrees, what is the measure of the other non-adjacent interior angle?

• 30 degrees

• 70 degrees

• 100 degrees

• 40 degrees

Tags

CCSS.8.G.A.5