Finding the Sum of Interior Angles of a Triangle

Solve for x.

• 16

• 11

• 50

• 6

In a triangle, how many total degrees are there?

• 100%

• 180 degrees

• it varies

• 360 degrees

If two of the angles of a triangle are 30 and 70 degrees, the third angle measures...

• 80

• 100

• 60

• 90

The interior angles of a triangle always add to what?

• 180 degrees

• 90 degrees

• 360 degrees

• 45 degrees

• A) 80°

• B) 90°

• C) 180°

• D) 260°

The sum of the interior angles in a triangle is ...

• 360 degrees

• 180 degrees

• 90 degrees

• 540 degrees

Using the theorem for the sum of the interior angles of a triangle, find the third angle for each triangle.

Solve for x.

• 63.2

• 116.8

• 135.7

• 45.3

Find the sum of the measures of the marked angles

Find the measure of the indicated angle. (remember that the sum of interior angles is equal to 180 degrees)

• 95

• 85

• 35

• 45