math so i can pass

Question

A pie was cut into equal parts.

Fifteen

pieces of pie were eaten. The

3

pieces that remained created an angle that measured

60°.

What was the angle measure of one piece of​ pie?

Answer 1

The key information that is given by the problem is that

1) The pie was cut into equal parts

2) There are 3 pieces left

3) The remaining 3 pieces form a 60 degree angle

From this information, we can conclude that each of the remaining 3 pieces has an angle of 20 degrees,

60° / 3 = 20°

Therefore, the angle of one pieces of pie is 20 degrees.