Two angles are adjacent if they share the same vertex and a common side, and additionally which condition must hold?
ATheir measures must be equal
BTheir non-common sides must be perpendicular
COne angle must be acute
DNo angle lies inside the other
Answer & Solution
Correct answer: D. No angle lies inside the other
Adjacent angles must have a common vertex and a common side, and one angle must not lie inside the other. Equality of measures or perpendicular sides is not required.
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