Answer:
5² + B² = 13²
B² = 13² - 5²
B² = 144 (This is the part where you have the squared variable for the missing side length on one side of the equal sign and a rational number on the other.)
B = 12
Answer:
b = 12
Step-by-step explanation:
[tex]5^2+b^2=13^2\\25+b^2=169\\[/tex]
Subtract 25 from both sides
[tex]25+b^2-25=169-25\\b^2=144[/tex]
Square root both sides
[tex]\sqrt{b^2}=\sqrt{144}\\b=12[/tex]
