D 5 cm C 15 cm А 9 cm B Panjang BC adalah....
BD² = AD² - AB²
BD² = 15² - 9²
BD² = 225 - 81
BD² = 144
BD = √144
BD = 12 cm
BC² = BD² + CD²
BC² = 144 + 5²
BC² = 144 + 25
BC² = 169
BC = √169
BC = 13 cm
BD=√15²-9²
=√225-81
= √144
= 12
BC=√12²+5²
=√144+25
= √169
= 13
Jadi Panjang BC Adalah 13.
