1) What’s the area of an equilateral triangle with side 5? (Please explain how you got your answer).

2) What’s the area of each of the triangles with the following sides:

a) 5, 12, 13

b) 4, 6, 8

c) 4, 6, 10

d) 4, 6, 11 (Explain the answers for parts c) and d)).

3) If a polygon has seven sides, what’s the sum of the all the angles?

4) If a regular polygon has eight sides, what is the measure of each angle?

5) If a polygon has six sides, how many diagonals does it have?

6) If I tell you that a polygon has 55 diagonals, can you tell me how many sides it has?

7) What would you call a polygon with twenty sides? Why?

**Subject Mathematics Geometry**