Question

Hello can anyone help me?

Answer 1

`y {}^(2) + 3 {}^(2) = 5 {}^(2)`

`y {}^(2) = 25 - 9 = 16`

`y = √(16) = 4`

(Y is the missing line of the triangle on the left)

`x ^(2) = {y}^(2) + 7 {}^(2)`

`x {}^(2) = 4 {}^(2) + 7 {}^(2)`

`x {}^(2) = 16 + 49`

`x {}^(2) = 65`

`x = √(65)`