INTERIOR ANGLES OF TRIANGLES

Front

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

Back

The sum of the interior angles of a triangle is always 180 degrees.

Front

If one angle of a triangle measures 90 degrees, what type of triangle is it?

Back

It is a right triangle.

Front

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

Back

Each interior angle in an equilateral triangle measures 60 degrees.

Front

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

Back

Subtract the sum of the known angles from 180 degrees.

Front

What is an exterior angle of a triangle?

Back

An exterior angle is formed by one side of the triangle and the extension of an adjacent side.

Front

What is the relationship between an exterior angle and the two opposite interior angles?

Back

The exterior angle is equal to the sum of the two opposite interior angles.

Front

If two angles of a triangle are 70 degrees and 50 degrees, what is the measure of the third angle?

Back

The third angle measures 60 degrees.

Front

What is the formula to calculate the measure of an angle in a triangle if two angles are known?

Back

Measure of third angle = 180 - (measure of first angle + measure of second angle).

Front

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

Back

It is called an acute triangle.

Front

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

Back

It is called an obtuse triangle.