tlong pke cranya jga kak

1. QS = akar (QR^2 + RS^2)
QS = akar (12^2 + 16^2)
QS = akar (144+256)
QS = 20

2. QN = akar (NS^2 + QS^2)
QN = akar (10^2 + 20^2)
QN = akar 500
QN = 10 akar 5