504. Find the area of a right triangle, both legs of which have a length of 1.
$\triangle$ The diagonal cuts the unit square into two such triangles, so the area of each of them is $1 / 2 . \triangleleft$

![](https://cdn.mathpix.com/cropped/2024_05_21_90703b5d5e76e3b5cd3dg-154.jpg?height=163&width=169&top_left_y=1232&top_left_x=1486)