Respuesta :

1) In Square, we know, 
Diagonal = side * √2
24 = s * √2
s = 24 / √2
s = 12√2

In short, Your Answer would be 12√2 or 16.92 m

2) According to Pythagoras theorem, 
 c² = a² + b²
 c² = 3² + 4²
 c² = 9 + 16
 c² = 25
 c = √25
 c = 5

In short, Your Answer would be 5

Hope this helps!