None, unless it's also isosceles (1.e. 45 degrees for the other two sides).
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Two of the three lines in a right triangle are perpendicular. Perpendicular lines meet at a 90 degree angle (also called a right angle). All right angle triangles have one right angle.
a cross.tictactoe board.anything that crosses.|_________||
It could be a right triangle if it has a right angle (90 degrees). If it does not have a right angle, then it is an acute triangle.
A right angle triangle
A Right Triangle or sometimes called a Right-angled Triangle has one angle = 90 degrees