Finding any length of a Right-Angled Triangle

What's Included

• Smart Notebooks Presentation
• Interactive Excel File
• Activ Inspire Flipchart
• Lesson Plan
• Microsoft PowerPoint Presentation
• Differentiated Worksheet

Finding any length of a Right-Angled Triangle

Key stage 3 mathematics for using Pythagoras' Theorem to calculate any length of a right-angled triangle.   Learning progresses from working with Pythagorean Triples to calculating the area of a right-angled isosceles triangle when only the hypotenuse is given.

At the start of the lesson students attempt to find the difference of two hypotenuse lengths in a composite shape.  The plenary challenges students to apply Pythagoras' Theorem to a complex shape made from two triangles.

Differentiated Learning Objectives
• All students should be able to calculate a smaller side of a Pythagorean Triple
• Most students should be able to calculate any side of a right-angled triangle using Pythagoras’ Theorem
• Some students should be able to apply Pythagoras’ Theorem to composite triangular shapes.
Pythagoras' Theorem and Right-Angled Triangles

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