Tuesday 29 August 2017

Opposite Angles

Opposite Angles

Opposite Angles

Two angles are called a pair of vertically opposite angles, if their arms form two pairs of opposite rays.
Let two lines AB and CD intersect at a point O. Then, two pairs of vertically opposite angles are formed.
(i) ∠AOC and ∠BOD            (ii) ∠AOD and ∠BOC
Vertically-opposite-angles

Theorem 1:
If two lines intersect then the vertically opposite angles are equal.
Vertically-opposite-angles

OPPOSITE ANGLES

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