[" In "/_ABC" the bisectors of "/_B" and "/_C" intersect each other "],[" at "O" .Prove that "/_BOC=90^(@)+(1)/(2)/_A" ."]

In DeltaABC , the bisectors of angleB and angleC intersect each other at O. Prove that. angleBOC=90^(@)+(1)/(2)angleA .

In the figure the bisectors of /_P and /_Q intersect to each other at a point R. Prove that /_PRQ=90^(@).

ABC is a triangle.The bisector of the exterior angle at B and the bisector of /_C intersect each other at D. Prove that /_D=(1)/(2)/_A

A B C is a triangle. The bisector of the exterior angle at B and the bisector of /_C intersect each other at D . Prove that /_D=1/2/_A .

In an isosceles triangle ABC, with AB=AC, the bisectors of /_B and /_C intersect each other at O. Join A to O. Show that: OB=OC

In quadrilateral ABCD, the bisectors of /_A and /_B intersect at E. Prove that, /_C+ /_D = 2/_ AEB.

In an isosceles triangle ABC, with AB = AC, the bisectors of /_ B and /_ C intersect each other at O. Join A to O. Show that : (i) OB = OC (ii) AO bisects /_A

In an isosceles triangle ABC, with AB = AC, the bisectors of /_ B and /_ C intersect each other at O. Join A to O. Show that : (i) OB = OC (ii) AO bisects /_A

In an isosceles triangle ABC, with AB = AC, the bisectors of /_ B and /_ C intersect each other at O. Join A to O. Show that : (i) OB = OC (ii) AO bisects /_A

In an isosceles triangle ABC, with AB = AC, the bisectors of /_ B and /_ C intersect each other at O. Join A to O. Show that : (i) OB = OC (ii) AO bisects /_A