Answer:
a= 56
b= 72
c= 52
Step-by-step explanation:
All 3 of the angles of a triangle = 180 (ALWAYS)
a + b + c = 180
so you can start by finding angle C
c = 180 - a - b
c = 180 - 56 - 72
c = 52
now, we can see that a = 56 and b = 72, this is because the angles don't change when one side is slid on a parallel.
