Parallel Lines and Triangles

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet. They are always the same distance apart.

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 a corresponding angle?

Back

Corresponding angles are pairs of angles that are in similar positions at each intersection where a straight line crosses two others.

Front

What is the relationship between same-side interior angles when two parallel lines are cut by a transversal?

Back

Same-side interior angles are supplementary, meaning they add up to 180 degrees.

Front

If angle A is 28 degrees, what is the measure of its corresponding angle when two parallel lines are cut by a transversal?

Back

The corresponding angle is also 28 degrees.

Front

If angle B is 56 degrees, what is the measure of the same-side interior angle?

Back

The same-side interior angle is 124 degrees (180 - 56 = 124).

Front

Solve for x if angle 1 + angle 2 = 180 degrees and angle 1 = 27 degrees.

Back

x = 153 degrees (180 - 27 = 153).

Front

If angle 3 is 52 degrees, what is the measure of its corresponding angle?

Back

The corresponding angle is also 52 degrees.

Front

What is the definition of supplementary angles?

Back

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

Front

What is the definition of congruent angles?

Back

Congruent angles are angles that have the same measure.