tolong isi rumus yha

Pake perbandingan
120 / 80 = n / 60
n = 120 x 60 / 80
n = 90


Semoga membantu

∠pad / ∠pbc = L juring pad / L juring pbc
120° / 80° = L juring pad / 60
L juring pad x 80° =120° x 60°
L juring pad x 80° =7200°
L juring pad           =7200° / 80°
L juring pad           =90 cm²  semoga membantu