Use Pythagoras' theorem if you know any two lengths of the triangle
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right angle!
leg+leg+hypotenuseThe legs are the two sides connected to the right angle(90). In a 45-45-90 triangle, the legs are the same length. The hypotenuse is the one not connected to the right angle (90). leg squared+ leg squared= hypotenuse squared.Add all the sides together.
A triangle with a 90° angle is called a "right triangle."
in a 45 45 90 right triangle 2 of the legs are equal making it isoceles
It is a right angle triangle and its largest angle is 90 degrees