Can the side lengths of 12, 15, and 13 form a triangle?
yes
no

Yes. 12 and 13 would be the legs, and 15 would be the hypotenuse. This would form a right triangle.

My answer is yes! The Triangle Inequality Theorem states that the sum of any 2 sides of a triangle must be greater than the measure of the third side. So the sum of 2 sides, must be greater than the third... I hope this helps please rate and thanks

We need more info then that