NumihanaTwo straight lines cross. One angle is 30°. What is the vertically opposite angle?
Answer: ________________
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Vertically opposite angles.
Vertically opposite angles
Numihana · England Year 6
Vertically opposite angles
Practice sheet
Name: ______________
Date: ______________
Vertically opposite angles
Two straight lines cross. One angle is 50°. What is the vertically opposite angle?
Answer: ________________
Two straight lines cross. One angle is 20°. What is the vertically opposite angle?
Answer: ________________
Two straight lines cross. One angle is 30°. What is the vertically opposite angle?
Answer: ________________
Two straight lines cross. One angle is 20°. What is the vertically opposite angle?
Answer: ________________
Two straight lines cross. One angle is 40°. What is the vertically opposite angle?
Answer: ________________
Numihana · England Year 6
Vertically opposite angles
Answer key
Name: ______________
Date: ______________
Vertically opposite angles
Two straight lines cross. One angle is 30°. What is the vertically opposite angle?
Answer: 30
Two straight lines cross. One angle is 50°. What is the vertically opposite angle?
Answer: 50
Two straight lines cross. One angle is 20°. What is the vertically opposite angle?
Answer: 20
Two straight lines cross. One angle is 30°. What is the vertically opposite angle?
Answer: 30
Two straight lines cross. One angle is 20°. What is the vertically opposite angle?
Answer: 20
Two straight lines cross. One angle is 40°. What is the vertically opposite angle?
Answer: 40
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The skill behind this activity
Vertically opposite angles
Department for Education: mathematics programmes of study ↗
Year 6 → Geometry → Properties of shapes · Selected statutory skill. Pack 2.2.0 · source checked 2026-10-12.
For teachers and parents
Use 180 degrees for a triangle and 360 for a quadrilateral. Subtract the other angles from the total. Opposite angles made by crossing straight lines are equal.
A common slip
Choose the correct relationship rather than treating every angle sum as 180.
Worked example
Two straight lines cross. One angle is 60°. What is the vertically opposite angle?
Answer: 60
Use 180 degrees for a triangle and 360 for a quadrilateral. Subtract the other angles from the total. Opposite angles made by crossing straight lines are equal.