Angle Relationships

Front

What is an Obtuse Angle?

Back

An obtuse angle measures more than 90 degrees but less than 180 degrees.

Front

What are Parallel Lines?

Back

Parallel lines are two lines that never cross each other.

Front

What are Alternate Interior Angles?

Back

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

Front

What are Vertical Angles?

Back

Vertical angles are the angles opposite each other when two lines cross. They are always equal.

Front

What are Corresponding Angles?

Back

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

Front

What is the sum of angles in a triangle?

Back

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

Front

If m∠7 = 115°, what is m∠2 if they are corresponding angles?

Back

m∠2 = 115°.

Front

If two angles are supplementary, what is their sum?

Back

The sum of supplementary angles is 180 degrees.

Front

What is the measure of a right angle?

Back

A right angle measures exactly 90 degrees.

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.