Properties of a right angled triangle
Add all interior angles and the lengths of the sides.
What is the angle that has been denoted by a square?
360[math]^\circ[/math]
90[math]^\circ[/math]
180[math]^\circ[/math]
For a triangle to be classed as a right-angled triangle, one of the interior angles MUST be 90 degrees and is denoted by a little box
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Information: Properties of a right angled triangle