Finding the missing angles of Triangles and Quadrilaterals

Front

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

Back

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

Front

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

Back

The sum of the interior angles of a quadrilateral is 360 degrees.

Front

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

Back

It is a right triangle.

Front

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

Back

To find the measure of a missing angle in a triangle, subtract the sum of the known angles from 180 degrees.

Front

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

Back

To find the measure of a missing angle in a quadrilateral, subtract the sum of the known angles from 360 degrees.

Front

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

Back

Each angle in an equilateral triangle measures 60 degrees.

Front

What is the relationship between the angles in a linear pair?

Back

The angles in a linear pair are supplementary, meaning they sum to 180 degrees.

Front

What is the measure of the fourth angle in a quadrilateral if the other three angles are 90°, 85°, and 95°?

Back

The fourth angle measures 90 degrees.

Front

What is the formula for finding the measure of an exterior angle of a triangle?

Back

The measure of an exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles.

Front

What is a supplementary angle?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.