If X + Y is equal to w + Z then prove that aob is a line

1.	If X + Y is equal to w + Z then prove that aob is a line
Answer» Given , X+Y = W+Z(1) TO PROVE :AOB is a line X+Y+W+Z =360° By (1) X+Y+X+Y=360 2X+2Y =360° 2( X+Y)=360° X+ Y = 360° ÷ 2 X +Y =180 ° Hence , AOB is a line

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