<human>:  Why is it called the Pythagorean Triangle?
<bot>: The Pythagorean triangle was named after Pythagoras, a Greek mathematician and philosopher. The Pythagorean theorem states that the square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides. The Pythagorean triangle is a special right triangle, with the ratio of the sides being 3:4:5.