Think you’ve got your head wrapped around **Parallel and Perpendicular Lines**? Put your knowledge to
the test. Good luck — the Stickman is counting on you!

Q. How many sets of parallel line segments are there in a regular octagon?

1

2

4

6

8

Q. How many sets of parallel line segments are there in a regular pentagon?

0

2

2.5

5

10

Q. What is the sum of all the interior angles in a dodecagon (12 sides)?

75°

150°

1080°

1800°

2160°

Q. What is the measure of one interior angle in a regular heptagon (7 sides)?

128.1°

128.6°

129.3°

900°

1260°

Q. Which of the following is a summary of Euclid's parallel postulate?

If two lines are parallel and crossed by a transversal, their corresponding angles will be congruent

If a line crosses two other lines and their two consecutive interior angles are supplementary, the two lines are parallel

If a line crosses two other lines and their two consecutive interior angles are not supplementary, the two lines are not parallel

If two lines are parallel and crossed by a transversal, their consecutive interior angles are supplementary

If two lines are parallel and crossed by a transversal, their consecutive interior angles are congruent

Q. What is the minimum number of right angles possible in a quadrilateral?

0

1

2

3

4

Q. Which of the following shapes cannot have any parallel lines?

Square

Pentagon

Decagon

Quadrilateral

Triangle

Q. Which of the following shapes *must* have at least one set of parallel lines?

Nonagon

Pentagon

Trapezoid

Quadrilateral

Triangle

Q. Which of the following shapes must have at least one set of perpendicular segments?

Right triangle

Quadrilateral

Regular pentagon

Regular octagon

Regular nonagon

Q. Which of the following shapes must have at least one set of perpendicular segments?

Parallelogram

Trapezoid

Regular quadrilateral

Regular pentagon

Regular hexagon