Geometry and measuresKey Stage 3

Vertically opposite angles

Identify equal opposite angles where two straight lines cross.

  • Vertically opposite angles are equal.
  • The two angles must be opposite, rather than next to each other.

Example 1

Find angle .

Vertically opposite angles are equal.

Example 2

Find angle .

Vertically opposite angles are equal.

Your turn

Question 1

Find angle .

Check answer
Vertically opposite angles are equal.
Question 2

Find angle .

Check answer
Vertically opposite angles are equal.
Question 3

Find angle .

Check answer
Vertically opposite angles are equal.
Question 4

Find angle .

Check answer
Vertically opposite angles are equal.
Question 5

Find angle .

Check answer
Vertically opposite angles are equal.
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