" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
sudut kedua 3/9x180= 60
sudut ketiga 4/9x180= 80 derajat
180 adalah jumlah ke3 sudut tersebut
9 = 180°
jadi, rumus = perbandingan dikali 20.
2×20°=40°
3×20°=60°
4×20°=80°