90o
A right angle is one of 90 degrees
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An angle with measure equal to 90 is called a right angle.
It is an isosceles right angle triangle
An isosceles triangle has two equal sides and two equal angles. A right triangle is any triangle with one angle that is a right angle. A right triangle could also be an isosceles triangle, but an isosceles triangle will not always have a right angle.
a triangle with two sides the same length and no right angle
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