Tentukanlah panjang jarak antara (-3, -7) dan (7, 7)

(-3,-7) dan (7,7)
x1 = -3 dan y1 = -7
x2 = 7 dan y2 = 7
Panjang jarak (r) = ....??

r^2 = (x2 - x1)^2 + (y2 - y1)^2
r^2 = (7 - (-3))^2 + (7 - (-7))^2
r^2 = (7 + 3)^2 + (7 + 7)^2
r^2 = 10^2 + 14^2
r^2 = 100 + 196
r^2 = 296
r = akar 296
r = akar (4 × 74)
r = 2 akar 74