Mohon di jawab pakai cara

AB = √12²+9²
AB = √144+81
AB = √225
AB = 15 cm
AC = √24²+7²
AC = √576+49
AC = √625
AC = 25 cm
BC = √AC²-AB²
BC = √25²-15²
BC = √625-225
BC = √400
BC = 20 cm

Panjang AB=12²+9²
=144+81=225
=√225=15
Panjang AC=24²+7²
=576+49=625
=√625=25
Panjang BC=25²-15²
=625-225=400
=√400=20(C)