Here's the Isosceles Lemma: take an isosceles triangle (two of the sides have the same length) with no angle larger than 90 degrees. Label the sides as in the figure below.

Keywords triangles, properties, types, equilateral, isosceles, scalene, congruency, area, Pythagorean theorem, right triangle, mathematics, architecture, engineering Email us at footage@avgeeks ...

The base of the isosceles triangle has been cut in half, so the base of the right-angled triangle is given a different letter, 𝒚. 𝒚 is half of 𝒙. Pythagoras’ theorem can then be used on ...