# Quadrilaterals: Triangles With Extra Sides Quiz

Think you’ve got your head wrapped around Quadrilaterals? Put your knowledge to the test. Good luck — the Stickman is counting on you!
Q. How many diagonals do quadrilaterals have?

1
2
3
4
5

One of their diagonals must lie completely outside the bounds of the figure
Both of their diagonals must lie completely outside the bounds of the figure
One of their diagonals must lie either completely or partially outside the bounds of the figure
Both of their diagonals must lie either completely or partially outside the bounds of the figure
Both of their diagonals must lie completely inside the bounds of the figure
Q. The sum of all interior angles in all quadrilaterals is equal to what?

180°
210°
270°
360°

0
1
2
3
4
Q. How many pairs of opposite sides do quadrilaterals have?

0
1
2
3
4
Q. Which of the following most accurately describes this figure?

A convex triangle
A convex polygon
A concave polygon
Q. Three angles in a quadrilateral measure 36°, 98°, and 106°. What is the measure of the last angle?

60°
90°
120°
150°
None of the above
Q. What is the value of x in a quadrilateral with angles measuring 5x, 3x – 2, 9x – 21, and 3x + 1?

7.9
10.1
16.9
19.1
21.9
Q. A quadrilateral has an interior angle that measures 270°. Is it concave or convex?

Concave
Convex
Both concave and convex
Neither concave nor convex
It is impossible to tell from the given information
Q. A quadrilateral has sides of lengths 3, 5, and 7. What is the length of the last side?

4
5
6
7
It is impossible to tell from the given information