GCSE Secondary Maths Age 13-17 - Geometry & Measures: Isosceles Triangles - Explained

The video tutorial explains how to prove that a given triangle is isosceles by demonstrating that it has two equal angles. The teacher walks through the problem, starting with a diagram and identifying key angles. Using properties of vertically opposite angles and the sum of angles in a triangle, the teacher calculates the necessary angles to prove the triangle is isosceles. The tutorial emphasizes the importance of providing reasons for each step and concludes with a breakdown of how marks are awarded for the solution.

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