[" 16.In a "/_ABC" ,the biseetoms of "/_B" and "LC" .Int-ersedt "],[" each other at a point "0." Prove that "/_BDC=90^(@)+(1)/(2)/_A" ."]

In DeltaABC , bisectors of angleB and angleC interesct each other at point O. Prove that angleBOC=90^(@)+(1)/(2)angleA i.e., angle1 =90^(@)+(1)/(2)

In DeltaABC , bisectors of angleB and angleC interesct each other at point O. Prove that angleBOC=90^(@)+(1)/(2)angleA i.e., angle1 =90^(@)+(1)/(2)

In DeltaABC , bisectors of angleB and angleC interesct each other at point O. Prove that angleBOC=90^(@)+(1)/(2)angleA i.e., angle1 =90^(@)+(1)/(2) A

In a ABC,/_ABC=/_ACB and the bisectors of /_ABC and /_ACB intersect at O such that /_BOC=120^(0). Show that /_A=/_B=/_C=60^(@).

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

ABC is a triangle in which the bisector of /_B and the bisector of exterior /_C meet at a point D such that /_BDC=30^(@). If /_ABD=40^(@), then /_ACD and /_BAC are respectively,equal to

In an isosceles right-angled triangle ABC, /_B=90^(@) . The bisector of /_BAC intersects the side BC at the point D. Prove that CD^(2) =2BD^(2)

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 .

The sides AB and AC of ABC are product to P and Q respectively.the bisectors of exterior angles at B and C of ABC meet at O( fig..19) prove that /_BOC=90^(@)-(1)/(2)/_A

In Delta ABC,AB=AC and the bisectors of /_B and /_C meet at a point O. Prove that BO=CO and the ray AO is the bisector of /_A.