3D Pythagoras Full Lesson

Struggling with 3D Pythagoras? This lesson takes you from the ground up, no assumed knowledge, right through to the trickiest exam-style questions that trip students up on the day.

We'll start with a bonus intro covering the basic trig you need as a foundation, plus exactly how to use your formula sheet with confidence (so you're never caught out wondering which formula applies).

From there, we build up step by step:

• Refreshing 2D Pythagoras and why it's the building block for everything in 3D

• Visualising 3D shapes and spotting the right-angled triangles hidden inside them

• Working through cuboids, pyramids, and more complex solids

• Tackling the multi-step questions that combine Pythagoras with trig — the ones that separate a grade 6 from a grade 8/9

Along the way, you'll get 'you do' questions to pause and try yourself, so you're actively practising, not just watching.

Whether you're just meeting this topic for the first time or you're aiming to nail the hardest questions on your paper, this lesson will get you there — clearly, calmly, and step by step.