The figure shows a right triangle ACB,
the product of the hypotenuse and the length of the altitude
drawn to the hypotenuse equals the product of the two legs or catheti.
View or post a solution.
Geometry software that can be used to learn and research:
Geometry Expressions, Cabri, Cinderella, GeoGebra, Geometer Sketchpad, C.a.R., TracenPoche, Mathematica.