**Pythagorean Theorem**

In any right triangle, the sum of the square of the two perpendicular sides is equal to the square of the longest side. For a right triangle with legs measures and and length of hypotenuse , the theorem can be expressed in the form

**Proved by Pythagoras**

Area of the large square = Area of four triangles + Area of small square

**Proved by Bhaskara**

Bhaskara (1114 - 1185) was an Indian mathematician and astronomer.

Area of the large square = Area of four triangles + Area of inner (smaller) square

**Proved by U.S. Pres. James Garfield**

Area of trapezoid = Area of 3 triangles

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