Quadrilaterals True or False

1. How many diagonals do quadrilaterals have? -> 1
2. Which of the following is true about convex quadrilaterals? -> Both of their diagonals must lie completely inside the bounds of the figure
3. The sum of all interior angles in all quadrilaterals is equal to what? -> 270°
4. How many pairs of adjacent sides do quadrilaterals have? -> 4
5. How many pairs of opposite sides do quadrilaterals have? -> 0
6. Which of the following most accurately describes this figure?

-> A convex quadrilateral

7. Three angles in a quadrilateral measure 36°, 98°, and 106°. What is the measure of the last angle? -> 120°
8. What is the value of x in a quadrilateral with angles measuring 5x, 3x – 2, 9x – 21, and 3x + 1? -> 21.9
9. A quadrilateral has an interior angle that measures 270°. Is it concave or convex? -> Concave
10. A quadrilateral has sides of lengths 3, 5, and 7. What is the length of the last side? -> It is impossible to tell from the given information

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