Answer:
[tex]5^{2} + 12^{2} = 13^{2}\\25+144=169[/tex]
Step-by-step explanation:
Squaring base and adjacent then adding them and finally getting the squareroot of the sum gives hypotenuse of a right angle triangle. In this case, squaring 5 and 12 then getting their square roots gives you 13, proving that it is a right angle
Here is the proof
[tex]5^{2}=25\\12^{2}=144\\13^{2}=169\\25+144=169[/tex]
Therefore, the above dimensions are for a right angled triangle.