Find the missing side of each right triangle (Pythagorean’s #Theorem)

Answer:
13
Step-by-step explanation:
The formula is a^2+b^2=c^2
A and B are the lines that make up the right angle, so 5 and 12
5^2+12^2=c^2
25+144=c^2
169=c^2
Once you arrived here you square root whatever is equal to c^2
c=13