For the next trigonometric identities we start with Pythagoras' Theorem: The Pythagorean Theorem says that, in a right triangle, the square of a plus the square of b is equal to the square of c: a 2 + b 2 = c 2. Dividing through by c2 gives. a2 c2 + b2 c2 = c2 c2. This can be simplified to: ( a c )2 + ( b c )2 = 1.

Area: A = 1 2bh, b=base,h=height. A right triangle has one 90° angle. The Pythagorean Theorem In any right triangle, a2 + b2 = c2 where c is the length of the hypotenuse and a and b are the lengths of the legs. Properties of Rectangles. Rectangles have four sides and four right (90°) angles.

Pythagoras. Born: c. 570 BC in on the island of Samos. Died: c. 495 BC (at about age 75) in Metapontum. Nationality: Greek. Famous For: Pythagorean Theorem. Pythagoras was a Greek mathematician known for formulating the Pythagorean Theorem. He was also a philosopher who taught that numbers were the essence of all things.

Pythagoras's Proof. Given any right triangle with legs a a and b b and hypotenuse c c like the above, use four of them to make a square with sides a+b a+b as shown below: This forms a square in the center with side length c c and thus an area of c^2. c2. However, if we rearrange the four triangles as follows, we can see two squares inside the.