Answer:
67.97
Step-by-step explanation:
let AC be length of ladder and BC be distance between ladder and wall and angle be theta
Now,
costheta=BC/AC
THETA =COS^-1(3÷8)
THETA=COS^-1(0.375)
THETA=67.97 DEGREE
B= 6
a^2 + b^2= c^2 hypotenuse formula
Plug in what you have
8^2 + b^2= 10^2
PEMDAS
64 +b^2= 100
combine like terms
b^2=36
divide
b=6
if ΔPQR ≈ ΔSTU =>
=> PQ/ST = PR/SU = QR/TU
9/7 = 12/8 = 15/10
9×8 = 7×12
72 = 84 (false)
=> ΔPQR ≠ ΔSTU
