Question

Jika P(7,5) dan Q(2,-7) maka panjang garis PQ adalah

Answer 1

PQ = Q - P
PQ = (2,-7)  - (7,5)
PQ = (2-7 , -7-5)
PQ = (-5 , -12)
PQ = √{(-5)² + (-12)²}
PQ = √25+144
PQ = √169
PQ = 13