Pythagoras - Charlotte's Web

Introduces Pythagoras Theorem. Main part of the lesson involves calculating missing side lengths on a number of connected triangles (looks a bit like a spider web). Context is a spider web which needs fixing. By finding the missing side lengths, students can help 'Charlotte' fix her web.

Also includes two real life examples which can be used as a plenary. First one is a ladder against a wall. Second one is the Eiffel Tower.

Learning Objectives :
What students should achieve by the end of the lesson (WALT – we are learning to)

• Identify right angled triangles

• Use knowledge of Algebra in other topics e.g. substitution, solving equations

• Learn Pythagoras Theorem and be able to use it

Learning Outcomes :
(WILF – what I’m looking for)

• All students will/must :

Be able to use Pythagoras Theorem to find the hypotenuse of a right angled triangle given the opposite and adjacent measurements.

• Most students will/should :

Be able to use Pythagoras to find any side of a right angled triangle given

• Some students will/could:

Be able to solve real life problems using Pythagoras Theorem and identify where it can be used. Have a good understanding of the proof behind Pythagoras theorem.