Jawabanmu

2014-04-12T19:40:24+07:00
X+4x=90
5x=90
x=18

besar pelurusnya adalah 18+90 = 108
2014-04-12T19:42:03+07:00
X + ¹/₄x = 90
⁵/₄ x = 90
x = 90 x ⁴/₅ = 72°

72° + y = 180°
y = 180 - 72 = 108°
x = sudutnya
y = sudut pelurusnya
x + ¹/₄x = 90
⁵/₄ x = 90
x = 90 x ⁴/₅ = 72°

72° + y = 180°
y = 180 - 72 = 108°