An isosceles right triangle.
Each of the acute angles is 45 degrees.
The legs are equal, and each leg is sqrt(2) times
half of the length of the hypotenuse.
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It is an isosceles right angle triangle that has two equal sides which has two 45 degree angles and a 90 degree angle.
An isosceles right triangle
An isosceles triangle is a triangle that has two sides of equal length. A right triangle has an interior angle of 90 degrees. A right isosceles triangle has both characteristics. The 90 degree angle will be the angle formed by the sides of equal length.
Right triangle (has one 90 degree angle). Isosceles triangle (has two equal length sides).
It is an isosceles triangle; and if it has a 90 degree angle and two 45 degree angles then it is an isosceles right angle triangle.