Angles & Triangles Unit

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal in measure.

Front

What is the relationship between alternate interior angles?

Back

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

Front

Define a linear pair of angles.

Back

A linear pair of angles are two adjacent angles that form a straight line. Their measures add up to 180 degrees.

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.

Front

What are corresponding angles?

Back

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

Front

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

Back

To find the value of an unknown angle in a triangle, subtract the sum of the known angles from 180 degrees.

Front

What is a transversal?

Back

A transversal is a line that intersects two or more lines at different points.

Front

What is the value of x if angle A is 37 degrees and angle B is a linear pair with angle A?

Back

x = 180 - 37 = 143 degrees.

Front

What type of angle pair are angles that are formed when two lines intersect?

Back

The angles formed when two lines intersect are called vertical angles.

Front

If two angles are supplementary, what is their relationship?

Back

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