Question

Tolong yaaa, jgn lupa pke caranya jwbannya jgn ngasal yhaa
yg gabisa, jgn jwb ok

Answer 1

Busur BC = 10 cm
Sudut BOC = 90°
Sudut AOB = 108°

Perbandingan panjang busur
AB/BC = ∠AOB/∠BOC
AB/10 = 108/90
AB = 6/5 . 10
AB = 12 cm (A)

Semoga membantu :)

Answer 2

Pkai trik superkilat aja
busur BC= 10cm dgn besr sdut  90⁰
90: 10= 9⁰ untuk 1cm
sdngkn AB= 108⁰
108⁰= 90⁰+18⁰cm
       = 10cm + 2cm
        = 12 cm