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Pythagorean Theorem

The pythagorean theorem used for squaring

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The Pythagorean theorem often used

  • to verify if a corner is square (90 degrees) 

and can be expressed as 

C2 = A2 + B2                         (1)

(1) can be transformed to express the length of hypotenuse C as

C = (A2 + B2)1/2                                     (1b)

Example - Determine the length of the Hypotenuse  - C

With A = 5 m and B = 10 m - the length of the hypotenuse - C - can be calculated as

C = ((5 m)2 + (10 m)2)1/2  

   = 11.2 m

Squaring a Corner 

The angle is square (90 degrees) if 

  • A = 3 (m, ft)
  • B = 4 (m, ft)
  • C = 5 (m, ft)

Hypotenuse Calculator

Calculate square triangle hypotenuse - C - length:

A  (m, mm, cm, in, ft)

B (m, mm, cm, in, ft)


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The Sine Rule

A / sin a = B / sin b = C / sin c                          (2)

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