I need help !!!!!!!!!!!!!!! For 1 and 2

Answer:
#1: 5
#2: [tex]\sqrt{40}[/tex]
Step-by-step explanation:
Inverse of Pythagorean Theorem: c²-b²=a²
c² b² a²
13²- 12² = 25
[tex]\sqrt{25}[/tex] = 5
Pythagorean Theorem: a²+b²=c²
a² b² c²
2² + 6² = 40
c = [tex]\sqrt{40}[/tex]