= 180-( 180-∠A)/2
=90+∠A/2
Think for yourself.
25( 1). (Similar to 24. )
(2)≈BOD = 180-[ 180-(≈A+≈B)/2]
= 180-[ 180-( 180-∠C)/2]= 90-∠C/2
That is ∠BOD=∠GOC
I really don't know what you are talking about.
20. It is better to use a similar delta. AED and admiral. Admiral and AMB. Compare with each other