Question

8. ABC is a triangle in which ZA = 72°, the internal bisectors of angles B and c meet in o. find the magnitude ofएंगल एबीसी ​

Answer 1

Answer:

Angle at O = 126°

Step-by-step explanation:

In ΔABC, ∠A + ∠B + ∠C = 180°

∠B + ∠C = 180° - ∠A = 180° - 72° = 108° .  .  .  .  .  .  .  .  (i)

As the internal bisectors of angle B and C meet at O,

In ΔBOC, Angle at O + ∠B/2 + ∠C/2 = 180°

=> Angle at O = 180° - (∠B/2 + ∠C/2) = 180° - 1/2(∠B + ∠C) = 180° - 54° = 126°

Answer 2

Answer:

Step-by-step explanation:

Please do this answer