Exploring the Triangle Angle Sum Theorem

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

• 90 degrees

• 180 degrees

• 270 degrees

• 360 degrees

Tags

CCSS.8.G.A.5

If a triangle has angles of 50 degrees and 45 degrees, what is the measure of the third angle?

• 65 degrees

• 95 degrees

• 85 degrees

• 75 degrees

Tags

CCSS.8.G.A.5

Given a triangle with angles 135 degrees and 25 degrees, what is the measure of the third angle?

• 20 degrees

• 50 degrees

• 30 degrees

• 40 degrees

Tags

CCSS.8.G.A.5

If a triangle has angles 50 degrees, 45 degrees, and an unknown angle, what is the unknown angle?

• 85 degrees

• 80 degrees

• 90 degrees

• 95 degrees

Tags

CCSS.8.G.A.5

What is the measure of the missing angle in a triangle with angles 135 degrees and 25 degrees?

• 20 degrees

• 30 degrees

• 25 degrees

• 15 degrees

Tags

CCSS.8.G.A.5

In a triangle, if one angle is 60 degrees and another is 50 degrees, what is the measure of the third angle?

• 60 degrees

• 90 degrees

• 70 degrees

• 80 degrees

Tags

CCSS.8.G.A.5

If a triangle has angles of 140 degrees and 20 degrees, what is the measure of the third angle?

• 30 degrees

• 20 degrees

• 40 degrees

• 10 degrees

Tags

CCSS.8.G.A.5

What is the value of x if the angles of a triangle are 42x, 66 degrees, and 72x?

• 3

• 2

• 4

• 1

Tags

CCSS.8.G.A.5

If the angles of a triangle are x + 63, x + 83, and 50 degrees, what is the value of x?

• 8

• -8

• -4

• 4

Tags

CCSS.8.G.A.5

Given the angles x + 71, 73 degrees, and x + 44 in a triangle, what is the value of x?

• -6

• -4

• -2

• -8

Tags

CCSS.8.G.A.5