Lengths in Right-Angled Triangles

What's Included

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

Lengths in Right-Angled Triangles

Students learn how to use Pythagoras' Theorem to calculate missing lengths in right-angled triangles.    As learning progresses they solve more complex problems involving triangular shapes.

The start of the lesson recaps using Pythagoras' Theorem to show whether a triangle is right-angled.  At the end students apply their learning to solve a complex problem involving the perimeter of a triangle and area of a square.

Lengths in Right-Angled Triangles Differentiated Learning Objectives
• All students should be able to use Pythagoras’ Theorem to find any length of a right-angled triangle.
• Most students should be able to use Pythagoras’ Theorem to find the height or base of an isosceles triangle.
• Some students should be able to prove Pythagoras’ Theorem using algebra.
Pythagoras' Theorem and Right-Angled Triangles

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