Finding Missing Angles in Triangles

What is the sum of all angles in any triangle?

• 90 degrees

• 180 degrees

• 360 degrees

• 270 degrees

If a triangle has angles of 50 degrees and 60 degrees, what is the measure of the third angle?

• 70 degrees

• 80 degrees

• 90 degrees

• 100 degrees

In a triangle, if two angles are 45 degrees each, what is the measure of the third angle?

• 45 degrees

• 60 degrees

• 100 degrees

• 90 degrees

Which of the following is NOT a step in finding a missing angle in a triangle?

• Use algebra to solve for the missing angle

• Add the known angles

• Subtract the sum from 180

• Multiply the known angles

If a triangle has angles of 90 degrees and 40 degrees, what is the measure of the third angle?

• 50 degrees

• 60 degrees

• 40 degrees

• 30 degrees