Question

Pada jajargenjang klmn dibawah ini, besar < l = (x+5)°, dan < m = (3x -25)°

Answer 1

< k = < m
< l = < n

2(x + 5) + 2(3x - 25) = 360
2x + 10 + 6x -50 = 360
8x - 40 = 360
8x = 400
x = 50

< l = 50 + 5 = 55°
< m = 3(50) - 25 = 150 - 25 = 125°