Prove that the bisectors ofa pair of vertically opposite angles are in the same
straight line.
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Step-by-step explanation:
AB and CD are straight lines intersecting at O. OX the bisector of angles ∠AOC and OY is the OY is the bisector of ∠BOD. OY is the bisector of ∠BOD. ... ∴ The bisectors of pair of vertically opposite angles are on the same straight line.
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