In the adjoining figure, ABCD is a parallelogram; AO and BO are the bisectors of ∠A and ∠B respectively. Prove that ∠AOB = 90°. why the equation ∠A+∠B= 180° in the solution is divided by 2
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the equation basically divided by two.. because we need angle obc and ocb for the triangle obc.
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bookwormz:
sry theres LB in place of LA
soo
L OBC = LB/2
similarly
L OCB = LC/2
now add them...and you'll get their sum to be 90°
ok thankyou
did u understand now?
no
sorry i am still in confusion
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