AI generatedGeometry and measuresKS3 / GCSE

Naming angles using three letters

Naming angles using three letters.

  • Use the stated properties and diagram markings, rather than judging by appearance.
  • Matching ticks mean equal lengths; matching arrows mean parallel lines.
  • A small square marks a right angle. Keep labels horizontal and include units.

Example 1

Name the marked angle using three letters.

Angle with a labelled vertexBAC35°
ABC or CBA.

The vertex letter must be in the middle.

Example 2

Name the marked angle using three letters.

Angle with a labelled vertexQPR120°
PQR or RQP.

The vertex letter must be in the middle.

Your turn

Question 1

Name the marked angle using three letters.

Angle with a labelled vertexBAC235°
Check answer
ABC or CBA.

The vertex letter must be in the middle.

Question 2

Name the marked angle using three letters.

Angle with a labelled vertexQPR36°
Check answer
PQR or RQP.

The vertex letter must be in the middle.

Question 3

Name the marked angle using three letters.

Angle with a labelled vertexBAC121°
Check answer
ABC or CBA.

The vertex letter must be in the middle.

Question 4

Name the marked angle using three letters.

Angle with a labelled vertexQPR236°
Check answer
PQR or RQP.

The vertex letter must be in the middle.

Question 5

Name the marked angle using three letters.

Angle with a labelled vertexBAC37°
Check answer
ABC or CBA.

The vertex letter must be in the middle.

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