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Pythagorean Theorem

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Subject: 
Algebra
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Geometry
Triangles
Euclidean geometry
Pythagorean theorem
Right triangle
World Wide Web
Special right triangles
CNote
Cathetus

This formula is extremely essential especially later on. Note that this formula only applies to right triangles.  The formula is

a^2+b^2=c^2

A and B being the two legs.

C being the hypotenuse of the triangle.

The hypotenuse (c) is the side opposite the largest angle in the triangle.  In this case for a right triangle, the hypotenuse will always be opposite of the right angle.

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