show that the bisector of two adjacent supplementry angles include a right angle
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let the measure of the two angles be 2x and 2y
The bisectors divide them into x,x and y,y .
As we know 2x+2y=180
=Therefore x+y=90
The bisectors divide them into x,x and y,y .
As we know 2x+2y=180
=Therefore x+y=90
pss621rsp8ebi8:
aage btao
x+y is the middle angle you want
make the figure and you'll understand
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