GEOMETRY: Unit #3A [Part 1]

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 two angles in a triangle are 45° and 75°, what is the measure of the third angle?

Back

The third angle measures 60°.

Front

Define an exterior angle of a triangle.

Back

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

Front

What is the measure of angle A if it is given that angle A = 20°?

Back

Angle A measures 20°.

Front

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

Back

To find an unknown angle, subtract the sum of the known angles from 180°.

Front

What is a corresponding angle?

Back

Corresponding angles are angles that are in the same position on two parallel lines cut by a transversal.

Front

What is the definition of an interior angle?

Back

An interior angle is an angle formed inside a polygon by two adjacent sides.

Front

What is the relationship between remote interior angles and exterior angles?

Back

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

Front

If angle A = 44°, what is the measure of the supplementary angle?

Back

The supplementary angle measures 136° (180° - 44°).

Front

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

Back

In a right triangle, the sum of the two non-right angles is 90°.