Answer:
ABCDE is a 5 sided figure called pentagon
Formula side-2 = number of triangle each triangle = 180 degrees
5-2=3 triangles X 180= 540 degrees
Question number 2
Same formula then you divide by the number of sides to determine each angle
8-2=6 triangles 180x6= 1,080 /8= 135 degrees for each angle
Step-by-step explanation: