Answer:
Hey!
Here, you can use the Pythagoras theorem:-
[tex]Hypotenuse^{2} = base^{2} +altitude^{2}[/tex]
Hypotenuse is x
Altitude is 12 cm.
Base is 5 cm.
Substituting the given values in the Pythagoras equation:-
[tex]x^{2} = 5^{2} +12^{2}[/tex]
[tex]x^{2} = 25 + 144[/tex]
[tex]x = \sqrt{25+144}[/tex]
[tex]x= \sqrt{169}[/tex]
x = 13cm
