Question

A distância entre os pontos A(-2,-2) e B(-4,-6) é:

Answer 1

A[xa, ya] = A[-2,-2];
B[xb, yb] = B[-4,-6];

d²AB = [xa-xb]² + [ya-yb]²
d²AB = [-2-(-4)]² + [-2-(-6)]²
d²AB = [-2+4]² + [-2+6]²
d²AB = 2² + 4²
d²AB = 4 + 16
d²AB = 20
dAB = V20
dAB = V4*5
dAB = 2V5