The isosceles right triangle is a special triangle. The two right-angle sides are equal, and the right-angle sides have an acute angle of 45, and the perpendicular of the median bisector on the hypotenuse is synthesized.
An isosceles right triangle is generally (1, 1, √2) (right, right, hypotenuse, the same below).
Extended data
nature
1. On the plane, the sum of the interior angles of a triangle is equal to 180 (interior angle sum theorem).
2. On the plane, the sum of the outer angles of a triangle is equal to 360 (the theorem of the sum of outer angles).
3. On the plane, the outer angle of a triangle is equal to the sum of two non-adjacent inner angles.
Inference: An outer angle of a triangle is greater than any inner angle that is not adjacent to it.
4. There are at least two acute angles among the three internal angles of a triangle.
5. At least one angle in the triangle is greater than or equal to 60 degrees, and at least one angle is less than or equal to 60 degrees.