Question

Does any one know how to do Pythagorean theorem

Answer 1

Answer:

19.42.

Step-by-step explanation:

$a^{2} + b^{2} =c^{2}$

All you need to remember is the slant(hypotenuse) is always c.

Answer 2

Answer:

x = 19.42

Step-by-step explanation:

x^2 = 21^2 - 8^2

= 441 - 64

= 377

x = squareroot of 377

x = 19.42