No 34 caranya gmn ya?

Mapel : Matematika
Bab : Dalil Phythagoras

BD^2 = AB^2 + AD^2
BD^2 = 9^2 + 12^2
BD^2 = 81 + 144
BD^2 = 225
BD = Akar 225
BD = 15 cm

CD^2 = BD^2 + BC^2
CD^2 = 15^2 + 8^2
CD^2 = 225 + 64
CD^2 = 289
CD = Akar 289
CD =17 cm

( C)