" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
∠AOB = 70°
∠ADC = 1/2 x70°
= 35°
Sifat segiempat tali busur lingkaran:
Jumlah sudut-sudut yang berhadapan = 180°
∠ADC + ∠ABC = 180°
35° + ∠ABC = 180°
∠ABC = 180° - 35°
∠ABC = 145° (D)