Finding Angles in Triangles

★★★★★ 5.0 • Year 9 Maths • 📁 Digital Resource

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By the end of this unit, students will be able to apply the properties of angles at a point to calculate unknown angles.

Curriculum Alignment: Key Stage 3: Geometry and Measures

derive and illustrate properties of triangles, quadrilaterals, circles, and other plane figures [for example, equal lengths and angles] using appropriate language and technologies
derive and use the sum of angles in a triangle and use it to deduce the angle sum in any polygon, and to derive properties of regular polygons

Year Group	Year 9 Maths
Resource Type	📁 Digital Resource
Format	Print & Digital
Curriculum	England & Wales (KS1/KS2), adaptable internationally
Added	4 March 2026