Question

Bantuin gw biar dapet pahala​

Answer 1

Nomor 1

Option A :

ML² = OM² - OL² = 25² - 7² = 625 - 49 = 576

ML = √576 = 24 cm

Option B :

Luas Segitiga MLO = 1/2 × ML × OL = 1/2 × 24 × 7 = 84 cm²

Option C :

Luas Layang-Layang = 2 × Luas Segitiga MLO = 2 × 84 = 168 cm²

Option D :

Luas Layang-Layang = 1/2 × OM × KL

168 = 1/2 × 25 × KL

168 = 12,5 × KL

KL = 168 ÷ 12,5

KL = 13,44 cm

Nomor 2 :

Option A :

OD² = OC² + CD² = 9² + 12² = 81 + 144 = 225

OD = √225 = 15 cm

Option B :

Luas OBDC  = 2 × Luas Segitiga OCD

= 2 × 1/2 × OC × CD

= 2 × 1/2 × 9 × 12

= 108 cm²

Option C :

Luas Layang-Layang = 1/2 × OD × BC

108 = 1/2 × 15 × BC

108 = 7,5 × BC

BC = 108 / 7,5

BC = 14,4 cm

Option D :

∠A = 60°

∠BOC = 2 . 60° = 120°

Pada Layang-Layang, jumlah sudut 360°

∠C dan B masing-masing = 90°

∠D = 360° - 120° - 90° - 90° = 60°