Answer:
The two other angles are 45 degrees each.
The three angles of every triangle always add up to 180 degrees.
-- A right triangle is a triangle that has a right angle in it.
-- A right angle is 90 degrees.
-- That leaves 90 degrees for the other two angles in the right triangle.
-- If it happens to be isosceles, then the other two angles are equal.
-- Those must both be 45 degrees.