Besar Sudut BAC??

<ACB = 180° – <DCB
= 180° – 144°
= 36°

<BAC => 180° – (36°) – (x) – (x+4)
<BAC => 144° – 2x + 4
<BAC => 2x = 144° – 4°
<BAC => x = 140°/2
<BAC => x = 70° …A

~Jawab~

Garis dan Sudut

___________________

∠ACB = 180° – 144°

∠ACB = 36°

Sehingga, besar ∠BAC :

∠BAC + ∠ABC + ∠ACB = 180°

x + x + 4 + 36 = 180

2x + 40 = 180

2x = 180 – 40

2x = 140

x = 70°

maka ∠BAC = 70°

Jawaban: A.

Tandai sebagai jawaban tercerdas ya jika berkenan! thanks:)