Calcea Johnson and Ne’Kiya Jackson, two Black seniors from St. Mary’s Academy in New Orleans, have done the unthinkable. In 2022, the amazing students created proof for the Pythagorean Theorem, which ...

Summary We prove the next generalization of the Steiner-Lehmus theorem: if two equal cevians intersect with each other on the angle bisector of the third triangle vertex, then the triangle is ...

Do you think there’s a triangle whose angles measure 41, 76 and 63 degrees? At first, answering this may seem easy. From geometry class we know that the sum of the measures of the interior angles of a ...