Question

The bisectors of exterior angle at b and c of triangle abc meet at o. if angle a=x degree then angle boc=

Answer 1

Answer:

90degrees-x/2

Step-by-step explanation:

sum of interior angles = opposite exterior angle

exterior angle at b=(anglec +x)/2

exterior angle at c =(angleb+x)/2

angle boc +exterior angle at b+exterior angle at c=180degrees

angle boc= 180-(anglec/2+angleb/2+x)

angle boc=90-x/2

Answer 2

Answer :: 90degree -x°/2