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# Common Calculators

## The Pythagorean Theorem

In mathematics, the Pythagorean theorem states that the square of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides.

Knowledge Example Calculator## Perimeter & Area

Area (A) is measured in square units, perimeter (P) is measured in units, and circumference (C) is measured in units.

Knowledge Calculator## Slope

Slope is basically the amount of slant a line has, and can have a positive, negative, zero or undefined value.

Knowledge Example Calculator## Percent & Decimal & Fraction

Percentage (from Latin per centum "by a hundred") is a number or ratio expressed as a fraction of 100. A fraction is a real number written as a quotient, or ratio, of two…

Knowledge Example Calculator Video