Trigonometry Finding Lengths And Angles — Interactive Lesson (Ages 14–16)

★★★★★ 5.0 • Year 10 Maths • 🎓 Interactive Lesson & Activities

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By the end of this unit, students will be able to:

understand and apply Pythagoras’ Theorem to find missing lengths in right-angled triangles;
use trigonometric ratios (sine, cosine, tangent) to find unknown angles and lengths in right-angled triangles;
apply these concepts to solve problems involving both 2D and 3D figures.

Curriculum Alignment: Key Stage 4: Geometry and Measures

apply Pythagoras’ Theorem and trigonometric ratios to find angles and lengths in right-angled triangles {and, where possible, general triangles} in 2 {and 3} dimensional figures

Designed for ages 14–16 (UK Year 10–11 / US 9th Grade–10th Grade). Aligned to the UK National Curriculum; adaptable to US state standards.

Year Group	Year 10 Maths
Resource Type	🎓 Interactive Lesson & Activities
Format	Digital Only
Curriculum	England & Wales — KS4 (Years 10–11)
Added	4 March 2026