Interior Exterior Triangle Flashcard

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 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.

Front

How do you calculate an exterior angle of a triangle?

Back

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

Front

If one angle of a triangle is 70 degrees and another is 56 degrees, what is the measure of the third angle?

Back

The third angle is 54 degrees (180 - 70 - 56 = 54).

Front

What is the relationship between the interior and exterior angles of a triangle?

Back

The exterior angle is equal to the sum of the two non-adjacent interior angles.

Front

If the exterior angle of a triangle is 119 degrees, what are the possible measures of the two non-adjacent interior angles?

Back

The two non-adjacent interior angles must sum to 119 degrees.

Front

What is the measure of an angle if its supplement is 34 degrees?

Back

The measure of the angle is 146 degrees (180 - 34 = 146).

Front

What is the measure of an angle if its complement is 46 degrees?

Back

The measure of the angle is 44 degrees (90 - 46 = 44).

Front

If x + 10 = 3, what is the value of x?

Back

x = -7.

Front

If 2x - 4 = 20, what is the value of x?

Back

x = 12.