tolpng yaa kak ... nanti aku aku kasih thank dan aku jadikan yang terbaik :) . tolong yaa kak no.3 yg (a) bentar lagi mau dikumpul :(

Kesebangunan

a)
Δ DCG ~ ΔIBC
<D = < I
<G = <C
<C = <B
(sudut, sudut, sudut)

b)
ΔCDG ~ ΔGHF
<D = <H
<G = <F
<C = <G
(sudut , sudut, sudut)

c)
CI/GD =BC/GC
CI/3 = 4/5
CI = 12/5

IB/DC = BC/GC
IB/4 = 4/5
IB = 16/5

HG/DC = FG/GC
HG/4 = 3/5
HG = 12/5

FH/GD = FG/GC
FH/3 = 3/5
FH = 9/5
...