# Maths KS3 / GCSE: Pythagoras

**The short clip demonstrates the theory of Pythagoras by showing how to calculate the Hypotenuse of a right-angled triangle and by using numbers it proves that the triangle is right angled.**

The clip progresses to show the practical applications of Pythagoras by calculating the height at which a ladder against a wall reaches, and solving the problem of what size TV will fit in a particular space.

This is from the series: Real Life Maths.

*Teacher Notes*

*Teachers can use the video clip to demonstrate how to apply Pythagoras and help pupils solve potential exam questions.*

*The learners could be arranged in a carousel arrangement; where they tackle exam questions with different skills such as calculating the shorter side, and proving that a triangle is right angled.*

*Using the video clip as support, Pythagoras lends to a variety of practical solutions.*

*So we could place learners in groups of 3 and take pictures around the school; where they would have to solve problems using Pythagoras.*

*The learners could feedback in a presentation format to the class.*

*Curriculum Notes*

*This clip will be relevant for teaching Maths at KS3/GCSE in England Wales and Northern Ireland. Also at National 4, 5 and Higher in Scotland.*

*This topic appears in OCR, Edexcel, AQA, WJEC in England and Wales, CCEA GCSE in Northern Ireland and SQA in Scotland.*