Question

if X+y=w+z,then prove that AOB is a line.​

Answer 1

all the best for your paper

Answer 2

x+y+w+z=360( angles on single point)

x+y+x+y=360(given)

2x+2y=360

2(x+y)=360

x+y=180

isum of linear angles is 180 then AOB is a line

you forget to mention o at centre.

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