3.1-3.3 - Parallel Lines and Angles of Polygons

Front

What are alternate interior angles?

Back

Angles that are on opposite sides of a transversal and inside the two lines it intersects.

Front

Identify the sum of the angle measures in a nonagon (9 sides).

Back

1260°

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

If two angles are vertical angles, what is true about their measures?

Back

They are equal.

Front

What is the formula to find the sum of the interior angles of a polygon?

Back

(n - 2) × 180°, where n is the number of sides.

Front

How many sides does a nonagon have?

Back

9 sides.

Front

What is the measure of each interior angle in a regular pentagon?

Back

108°.

Front

If ∠4 and ∠5 are alternate interior angles, what can be said about their measures?

Back

They are equal.

Front

Find the measure of the missing angle if one angle is 40° and they are supplementary.

Back

140°.

Front

What are corresponding angles?

Back

Angles that are in the same position on two parallel lines in relation to a transversal.