Question

Sudut A dan sudut B saling berkomplemen dengan perbandingan 7:11. besar A adalah

Answer 1

Sudut A = 7/18 x 90 = 35°

Answer 2

A : B = 7 : 11
A = (B x 7) / 11 = 7/11 B
A + B = 360
=> 7/11 B + B = 360
=> 18/11 B = 360
=> B = 360 x 11/18 = 220
=> A = 7/11 x 220 = 140