Angles in Triangles and Parallel Lines Cut by a Transversal

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

Define Alternate Interior Angles.

Back

Alternate Interior Angles are pairs of angles that are on opposite sides of the transversal and inside the two lines.

Front

Define Corresponding Angles.

Back

Corresponding Angles are pairs of angles that are on the same side of the transversal and in corresponding positions.

Front

What are Same Side Interior Angles?

Back

Same Side Interior Angles are pairs of angles that are on the same side of the transversal and inside the two lines.

Front

Define Alternate Exterior Angles.

Back

Alternate Exterior Angles are pairs of angles that are on opposite sides of the transversal and outside the two lines.

Front

If one angle of a triangle is 60 degrees and another is 50 degrees, what is the measure of the third angle?

Back

The third angle measures 70 degrees (180 - 60 - 50 = 70).

Front

What is the relationship between corresponding angles when two parallel lines are cut by a transversal?

Back

Corresponding angles are equal when two parallel lines are cut by a transversal.

Front

If two angles are supplementary, what is the sum of their measures?

Back

The sum of the measures of supplementary angles is 180 degrees.

Front

If two angles are complementary, what is the sum of their measures?

Back

The sum of the measures of complementary angles is 90 degrees.

Front

Find the measure of the missing angle if one angle is 125 degrees and they are supplementary.

Back

The missing angle measures 55 degrees (180 - 125 = 55).