Angles in Triangles Worksheets | KS2 Geometry | Missing Angles | Year 5 & 6

Looking for a structured, ready-to-teach geometry resource that builds confidence with missing angles? This comprehensive Angles in Triangles Activity Pack supports KS2 pupils in mastering the 180° rule through scaffolded practice, clear progression and reasoning challenges. Perfect for Year 5, Year 6 and SATs preparation.

What’s Included (17 Pages)

✔ Foundation worksheet – Right-angled triangles
✔ Developing worksheet – Scalene triangles
✔ Greater Depth worksheet – Isosceles triangles
✔ Mixed Mini Test (12 questions)
✔ Challenge & Reasoning section
✔ Teacher Notes with differentiation ideas
✔ Complete answer key for all sections

Pupils will learn to:

• Recall that angles in a triangle add to 180°

• Find missing angles in right-angled triangles

• Apply the angle sum rule in scalene triangles

• Use base angle properties in isosceles triangles

• Identify triangle types

• Explain mathematical reasoning clearly

Built-In Progression

This pack moves from fluency to reasoning:

1. Scaffolded practice
2. Increasing independence
3. Mixed assessment
4. Explanation & problem-solving

Ideal for whole-class teaching, guided groups, homework or intervention.

Why Teachers Love It

✔ Clear differentiation (Foundation → Greater Depth)
✔ Visual, pupil-friendly design
✔ Assessment-ready mini test
✔ Reasoning questions included
✔ Saves planning time
✔ Full answer key provided

If you’re teaching angles in triangles, this structured pack gives you everything you need in one organised, classroom-ready resource.

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