Question

If a triangle had lengths of 7 inches and 3 inches, what is the third side

Answer 1

Without an angle, we cannot solve for the third side, unless this is a right triangle

This is the formula for a right triangle
c=hypotenuse
a and b are the other two sides

`{a}^(2) + {b}^(2) = {c}^(2)`
If 7 and 3 are the length in inches of the angles beside the 90° angle, then

`{3}^(2) + {7}^(2) = {c}^(2) \\ 9 + 49 = {c}^(2) \\ c = √(58)`

Answer 2

The third side would be 21 because you multiply 7*3=21