Latihan soal MTK

Jawab:

1. L juring AOB=108/360. 616= 184,8 cm²

  d lingk = 28 cm

  r lingk = d/2 = 14 cm

  L lingk = 22.7 r² = 22/7.14²= 616 cm²

2. ∠AB = 180°

   ∠AOC=120°

   ∠COB=180°-120°=60°

    pjg busur BC=18 cm dg sudut 60°

    pjg busur AC=18×2=36 cm dg sudut 120° karena jika ∠BOC=60° setara

    18cm maka ∠AOC=120° yg artinya 2x besar  ∠BOC=60° shg 18×2=36

    cm

3. L daerah terarsir = 1/4 L lingk dg r=14 cm

   L lingk= 22/7.14.14=616 cm²

   1/4 L lingk=616/4=154 cm²