Question

Rezolvare va roggggggg

Answer 1

tot cercul=360°AOC

arcAB=1/4din360°=90°

arcAC=1/3din360°=120°=

<AOC(unghi la centru)=360-(120°+90°)=150°

∆AOCisoscel

<A=<C=(180°-150°)/2=30°/2=15°

R:15°;15°;150°

Answer 2

Răspuns:

Explicație pas cu pas:

arc  AB=90°  si arc BC=360°/3=120°

∡AOC=360°-(90°+120°=360°-210°=150°

ΔAOC  este isoscel de baza AC  ⇒∡OAC=(180°-150°)/2=30°/2=15°

∡OAC=15°