3.2 Exterior Angle of a Triangle

Front

What is an exterior angle of a triangle?

Back

An exterior angle of a triangle is formed by one side of the triangle and the extension of an adjacent side. It is equal to the sum of the two remote interior angles.

Front

What are remote interior angles?

Back

Remote interior angles are the two angles inside a triangle that are not adjacent to a given exterior angle.

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

What is the measurement of a right angle?

Back

90 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 an exterior angle?

Back

The measure of an exterior angle is equal to the sum of the measures of the two remote interior angles.

Front

What is the relationship between an exterior angle and its adjacent interior angle?

Back

The exterior angle is equal to the sum of the two remote interior angles, and it is supplementary to its adjacent interior angle.

Front

If Angle W is an exterior angle, which angles are its remote interior angles?

Back

The remote interior angles are the two angles inside the triangle that are not adjacent to Angle W.

Front

What is the measure of angle b if angle a is 54 degrees and angle c is 90 degrees in a triangle?

Back

Angle b is 36 degrees (since 180 - 54 - 90 = 36).

Front

What is the definition of a triangle?

Back

A triangle is a polygon with three edges and three vertices.