A 90 degree angle

A triangle with one right angle

The opposite angle from the right angle in a right triangle

The sides of a right triangle that are adjacent to the right angle

Multiplying a number by itself

The product of a number multiplied by itself

A number that cannot be expressed as a fraction or repeating decimal

A number that can be expressed as a fraction or repeating decimal

The theory that the square of the hypotenuse is the sum of the squares of the other two sides

To roughly calculate the the answer