BACK TO WORKSHEETSIn this worksheet, calculate the unknown angle in a triangle.
Question:
Calculate the unknown angle in the triangle.
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Answer:
The angles in any triangle add to 180°.
Angle = 180° - 54° - 64° = 62°
The unknown angle is 62°.
In this worksheet, students use their knowledge of the properties of a triangle to evaluate unknown angles.
Key stage: KS 2
Year: Year 4 11+ worksheets
Curriculum topic: Maths and Numerical Reasoning
Curriculum subtopic: 2D Shapes: Triangles, Quadrilaterals and Polygons
Difficulty level: 
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