In Fig. 6.38, the sides AB and AC of ABC are produced to points E and D respectively. If bisectors BO and CO of CBE and BCD respectively meet at point O, then prove that `/_B O C=90o-1/2/_B A C`.

In Fig. 7.48, sides AB and AC of DeltaA B C are extended to points P and Q respectively. Also, /_P B C\ \ A B .

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

If DeltaABC,angleA=52^@ , Its sides AB and AC are produced to the points D and E respectively. If the bisectors of the angleCBD and angleBCE meet at point O, then angleBOC is equal to:

In figure, sides AB and AC of a Delta ABC are produced to P and Q, respectively. The bisectors of lt PBC and lt QCB intersect at O. Tnen. ltBOC is equal to

In a triangle ABC , angle A=72^@ . Its sides AB and AC are produced to the points D and E respectively. If the bisectors of the angle CBD and angle BCE meet at point O, then angle BOC is equal to:

The sides AB and AC of triangle ABC are produced to points D and E, respectively. The bisectors of angle CBD and angle BCE meet at P. If angle A=72^circ , then the measure of angle P is:

In a triangle ABC , angle A=52^@ . Its sides AB and AC are produced to the points D and E respectively. If the bisectors of the angle CBD and angle BCE meet at point O, then angle BOC is equal to: triangle ABC में angle A=52^@ है। इनकी भुजाएं AB और AC क्रमशः D और E तक बढाई जाती है। अगर angle CBD और angle BCE समदूविभाजक बिंदु O पर मिलते हैं, तो angle BOC बराबर हैः

The sides AB and AC of triangle ABC are produced to points D and E, respectiely. The bisectors of angleCBD " and " angleBCE meet at P. If angle A = 82^(@) , then the measure of angle P is :