Answer:
52 cm
Step-by-step explanation:
Using pythagoras theorem
hypothenuos² = adjacent² + opposite²
- hypothenuos is the longest side
- adjacent and opposite are the two other sides
[tex] {x}^{2} \: = \: {48}^{2} + {20}^{2} \\ {x}^{2} \: = \: 2304 + 400 \\ {x}^{2} \: = \: 2704 \\ x \: = \: \sqrt{2704} \\ x \: = \: 52cm[/tex]
