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Opposite Angles
See It in Action
Two examples of the idea done right—and one common look-alike that is not right.
EXAMPLE
EXAMPLE
NON-EXAMPLE
Definition
Two angles in a polygon that are across from each other and do not share a side.
In simple terms:
Angles that face each other.
Example:
In parallelogram ABCD, ∠A and ∠C are opposite angles. ∠B and ∠D are also opposite angles.
Important Note (Parallelograms):
In a parallelogram, opposite angles are congruent (they have equal measure).
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