Question 146493
15^2+X^2=(X+9)^2
225+X^2=X^2+18X+81
18X=225-81
18X=144
X=144/18
X=8 FEET FOR THE LOWER PART OF THE POLE.
8+9=17 FEET FOR THE UPPER PART OF THE POLE.
PROOF:
15^2+8^2=17^2
225+64=289
289=289