Pls help; I am kind of suckish with Pythagorean Theorem

Also, please show the method, as I would like to understand. Thank you.

Pls help I am kind of suckish with Pythagorean Theorem Also please show the method as I would like to understand Thank you class=

Respuesta :

Answer:  x = 20

Step-by-step explanation:

Pythagorean Theorem is: a² + b² = c²  where c is the hypotenuse

Given: a = 21, b = x, c = 29

21² + x² = 29²

441 + x² = 841

        x² = 400

    √x² = √400

      x = 20