Answer:
⁵/₃
Step-by-step explanation:
If you are at the foot of the guy wire, the wire is going <em>up</em>.
Slope = Δy/Δx = 25/15 = ⁵/₃
If you are at the top of the pole, the wire is going <em>down</em>.
Slope = Δy/Δx = -25/15 = -⁵/₃
P = a + b + c
P - a - c = b
Answer: b = P - a - c
a1) 65
a2) 25
a3) 45
all triangle equal to 180