Find the length of the third side. round to the nearest tenth if necessary. legs: 12in. and 16in

I am assuming this is a right traingle

if a right triangle has legs legnth a and b and hypotonuse legnth c then

a²+b²=c²

legs are 12 and 16

a=12

b=16

12²+16²=c²

144+256=c²

400=c²

sqrt both sides

20=c

the legnth is 20in, assuming you have a right triangle

A^2 + b^2 = c^2 12^2 + 16^2 = c^2 C = 400 so we square that and get the third side which is 20