Triangle Sum Theorem

Front

What does the Triangle Sum Theorem state?

Back

The sum of all angles in a triangle is 180°.

Front

If one angle of a triangle measures 50°, what is the sum of the other two angles?

Back

130°.

Front

What is the measure of each angle in an equilateral triangle?

Back

Each angle measures 60°.

Front

Define an acute angle.

Back

An angle that measures less than 90°.

Front

Define a right angle.

Back

An angle that measures exactly 90°.

Front

What is an obtuse angle?

Back

An angle that measures more than 90° but less than 180°.

Front

How do you find the measure of a missing angle in a triangle?

Back

Subtract the sum of the known angles from 180°.

Front

What type of triangle has one right angle?

Back

A right triangle.

Front

What type of triangle has all angles less than 90 degrees?

Back

An acute triangle.

Front

What type of triangle has one angle greater than 90 degrees?

Back

An obtuse triangle.