Question

Bantuin ya?
baik deh yang mau bagi caranya
makasii bangett

Answer 1

D) CF/(CF + 4) = 5/7
7 × CF = 5 × (CF + 4)
7CF = 5CF + 20
7CF - 5CF = 20
2CF = 20
CF = 20/2 = 10 cm

f) FE ={(DC × FA) + (AB × DF)}/(AF + FD)
FE = {(2 × 3) + (8 × 6)}/(3 + 6)
FE = (6 + 48)/9
FE = 54/9 = 6cm