tolong ya kak........

pakai rumus pyithagoras

c^2 = a^2 + b^2
c = BC = kemiringan
a = BQ = alas
b = CQ = tinggi

dik : alas = 20 m, tinggi = 15 m

C^2 = A^2 + B^2
BC^2 = BQ^2 + CQ^2
BC^2 = 20m^2 + 15m^2
BC^2 = 400 + 225
= 625
BC = AKAR 625
= 25 m ( b. )