" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
P + Q + R = 180
P + Q = 180 - R
karena siku-siku, maka salah satu sudutnya 90'(misalkan R)
P + Q = 180 - 90
P + Q = 90