Nomor 10 dan 12 pakai cara Trims

Nomor 10.
<AOB/AOB=<COD/COD
63/15=42/x
x=42×15/63
=630/63
=10 cm²

Semoga membantu...
# Maaf kalau Salah...

12). AC*2 = AO*2 - CO*2
= 10*2 - 6*2
= 10 × 10 - 6 × 6
= 100 - 36
AC*2 = 64
AC = 8


keterangan : *2 itu kuadrat yaaa