Question

Помогите, оч сложнооооо

Answer 1

<KAC = <KAB + <BAC

1) <KAB = 90°-<KBA

<KBA = 180°-110° = 70°

<KAB = 90°-70° = 20°

2) <BAC=180°-<ABC-<BCA=180°-110°-50°=20°

3) <KAC = 20°+20° = 40°

Ответ: 40°