Vertically opposite
Jargon-Free Definition
Angles opposite each other when two lines cross.
QCAA/AC9 Definition
Angles that are opposite each other when two straight lines intersect.
Examples of Word Use in School
- Mark the vertically opposite angles.
- Explain why the vertically opposite angles are equal.
- Use vertically opposite angles to Solve the unknown.
Mathematical Definition
When two lines intersect, each pair of vertically opposite angles is equal in measure.