Marinada '21

[lang=hr] U polovištu hipotenuze pravokutnog trokuta povučena je okomica na hipotenuzu. Kolika je duljina onog dijela okomice koji se nalazi unutar trokuta ako su duljine kateta $18$ i $24$? [/lang] [lang=en] The lengths of the legs of a right triangle are $18$ and $24$. A line perpendicular to the hypotenuse of that right triangle is drawn through the midpoint of the hypotenuse. What is the length of the part of that line which is inside the triangle? [/lang]