It is an isosceles right angle triangle.
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A right triangle has a 90 degree angle in it. This is not to be confused with a wrong triangle, which has two 90 degree angles.
A triangle has only three angles and they sum to 180 degrees.
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An equilateral triangle has 3 interior 60 degree angles but a right angle triangle can have 3 interior angles of 90, 60 and 30 degrees
A triangle has three angles, not "angels." The sum of the angles will equal one hundred eighty degree. An equilateral triangle has three equal angles all measuring sixty degrees.