In an isoseles `triangle ABC` . The bisectors of `angleB and angleC` meet at O if `angle BOC = 140^(@)` . What is the measure of `angle A` ?

Lines AB and CD intersect at O i.e. angle 2 + angle 4 = 112 ^(@). What is the measure of angle 1.

In the fig. triangle AB=AC and bisectors of angleB and angleC meet at a point O. prove that BO=CO and the ray AO is bisector of angleA

In an isosclees triangle ABC, with AB = AC, the bisectors of angleB and angleC intersect each other at O. Join A to O show that : OB=OC.

In an isosclees triangle ABC, with AB = AC, the bisectors of angleB and angleC intersect each other at O. Join A to O show that : AO bisects angleA .

In triangle ABC, r=(R )/(6) and r_(1)=7r . Then the measure of angle A =

In fig, AD and CE are the angle bisectors of angleA and angleC respectively. If angleABC=90^@ then find the angleAOC

If vertical angle of an isosceles triangle is 40^@ . Find the measure of other two angles.

ABC is an isosceles triangle with AB=AC draw APbotBC to show that angleB=angleC

If the angles A,B and C of a triangle ABC satisty the relation 2B=A+C, find the measure of angle B .