right angle=90 degrees and a right triangle has one side of it that forms a 90 degree angle...as for the naming "right" don't know but it refers to 90 degree angle
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The longest side a right angle triangle is its hypotenuse
Its base or adjacent side if it's a right angle triangle.
A triangle with a 90 degree angle and two acute angles is a right angle triangle.
The opposite side of the right angle in a triange is the hypotenuse.
A right triangle is a triangle with a right angle.a right triangle is a triangle with 1 side as a right angle