The sum of all interior angles in a polygon is
180(n - 2), where n = the number of sides in the polygon.
now, notice this figure above, it has 5 sides, namely is a PENTAgon, so the sum of all its interior angles is 180( 5 - 2), or 540, therefore
Answer:

Step-by-step explanation:

Plug in the 6 to the equations. Since B is the midpoint of AC, then both should be equal once plugged in [and solved].

It should be 1/4 because one third of three fourths is one fourth. I hope this helps!