Question

Please answer correctly !!!!! Will mark Brianliest !!!!!!!!!!!!!!

Answer 1

Answer:

$\sqrt{143}$

Step-by-step explanation:

Use pythagorean theorem to find the missing side.

$a^2+b^2=c^2$

$1^2+b^2=12^2\\1+b^2=144\\b^2=143\\b=\sqrt{143}$

This can not be simplified any further.

The third side in simpliest radical form is $\sqrt{143}$.