Jika bsar sudut AOD 150 dersjat, OB 8 cm, dan ED 6 cm, kliling daerah yg diarsir adlah...cm a. 19 satu pertiga phi + 28 b. 18 dua pertiga phi + 28 c. 18 satu pertiga phi + 28 d. 17 dua pertiga phi + 28
beserta caranya ya
hsnrb
Cari keliling CD = phi x d = x phi x 28 = phi
Cari keliling EB = phi x d = x phi x 16 = phi
Cari keliling AB = phi x d = x phi x 16 = 4phi
Total = CD + EB + AB + AO + BO + CB + ED = phi + phi + 4phi + 8 + 8 + 6 + 6 = phi + 28 = phi + 28
= phi x d
= x phi x 28
= phi
Cari keliling EB
= phi x d
= x phi x 16
= phi
Cari keliling AB
= phi x d
= x phi x 16
= 4phi
Total
= CD + EB + AB + AO + BO + CB + ED
= phi + phi + 4phi + 8 + 8 + 6 + 6
= phi + 28
= phi + 28
Jadi, jawabannya adalah B.
semoga membantu :)