Right-Angled

A right-angled triangle is any triangle having one right angle. The side opposite the right angle is called the hypotenuse. A right-angled riangle may be isosceles or scalene.

Finding angles in right-angled triangles - KS3 Maths - BBC Bitesize

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geometry - Finding an unknown angle in a right-angled triangle - Mathematics Stack Exchange

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3,804 Right Angled Triangle Images, Stock Photos, 3D objects

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