(Pythagoras Theorem) Hi, I need help with this question. How am I suppose to find the length of the one-edge path A-C-G?

Answer:
AB = 60
BC = 80
Pythag: 60^2 + 80^2 = c^2
3600 + 6400 = 10000
c=100
A-C = 100
C-G = 120
100 + 120 = 220
A - C - G = 220 cm