Answer:
![\boxed{ \bold{x = 4.54}}](https://img.qammunity.org/2021/formulas/mathematics/high-school/nyu2gfnfnw6fhudd9yt9nu5wtw7ez0bt3s.png)
Explanation:
![\sf{Given}](https://img.qammunity.org/2021/formulas/mathematics/high-school/fcajo5upu3r88e7oyss1jbbzxnvw5yytkx.png)
![\sf{hypotenuse = 5}](https://img.qammunity.org/2021/formulas/mathematics/high-school/dnpl857fmnlt41jau6c2q3uydk4zmgwppf.png)
![\sf{base = 2.1}](https://img.qammunity.org/2021/formulas/mathematics/high-school/c3cw36p0hbqbqiz7ohoj0l6ffmpins0lqq.png)
![\sf{perpendicular = x}](https://img.qammunity.org/2021/formulas/mathematics/high-school/jjnm9pr1zabfg413pmkjd95x12rhzzaqxf.png)
Now, Let's find the value of x
Using Pythagoras theorem
![\sf{ {h}^(2) = {p}^(2) + {b}^(2) }](https://img.qammunity.org/2021/formulas/mathematics/high-school/4vtb6g6xt8i307zacgo95fnjpcxhu8dswo.png)
Plug the values
⇒
![\sf{ {5}^(2) = {x}^(2) + {2.1}^(2) }](https://img.qammunity.org/2021/formulas/mathematics/high-school/pwapnla9e0q6ihaocea71po443o6imhilv.png)
Evaluate the power
⇒
![\sf{25 = {x}^(2) + 4.41}](https://img.qammunity.org/2021/formulas/mathematics/high-school/n8azh4ew494u9b26alqohojrdlpsjjpaqw.png)
Swap the sides of the equation
⇒
![\sf{ {x}^(2) + 4.41 = 25}](https://img.qammunity.org/2021/formulas/mathematics/high-school/32sksceo0w541jrkpuk70qyh6zumrqr7c6.png)
Move constant to R.H.S and change it's sign
⇒
![\sf{ {x}^(2) = 25 - 4.41}](https://img.qammunity.org/2021/formulas/mathematics/high-school/8nw25o015j177i6y21d6urrqdc3byvlxhh.png)
Calculate the difference
⇒
![\sf{ {x}^(2) = 20.59}](https://img.qammunity.org/2021/formulas/mathematics/high-school/2f6b7dhsbay7g3nnxct99c7zcte0ndsil6.png)
Squaring on both sides
⇒
![\sf{x = 4.54}](https://img.qammunity.org/2021/formulas/mathematics/high-school/nruylqoocvclqv2m4s11ijwj34nt7busc1.png)
Hope I helped!
Best regards!!