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Triangles: Calculate Unknown Angles

In this worksheet, students use their knowledge of the properties of a triangle to evaluate unknown angles.

'Triangles: Calculate Unknown Angles' worksheet

Key stage:  KS 2

Curriculum topic:   Geometry: Properties of Shapes

Curriculum subtopic:   Compare Shape Properties

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

In this worksheet, calculate the unknown angle in a triangle.

 

Question:

Calculate the unknown angle in the triangle.

Triangle5462

Answer:   

The angles in any triangle add to 180°.

Angle = 180° - 54° - 64° = 62°

The unknown angle is 62°.

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