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Pythagorean Theorem Calculator

Find the missing side of a right triangle from the other two, plus its area, perimeter and angles.

Leave the side you want blank.

Side c

5

Area
6
Perimeter
12
Angle opposite a
36.8699°
Angle opposite b
53.1301°

Show the work

  1. Square the two sides and add them

    c to the power of 2 = a to the power of 2 + b to the power of 2

    3 to the power of 2 + 4 to the power of 2 = 25

  2. Take the square root

    c = √c to the power of 2

    √25 = 5

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