Easy ten points........................…

We know that the interior angles of a pentagon add to 540, so each individual angle is 108. Because the lines in the pentagram (the star) are lines, we can use complimentary angles to find that one base angle of the isoceles triangle is 72. That means the other base angle is 72. When you add them together, you get 144. Now we know that a triangle has 180 degrees of total angles, so 180-144 is 36. So y=36.