Statement Problem: The perimeter of a triangle is 19 inches. One side measures 7 inches. Another side is 5 inches long.
Find the length of the third side c.
Solution:
Thus, the perimeter of a triangle with lengths a, b and c is;
[tex]P=a+b+c[/tex][tex]\begin{gathered} \text{Let a=7inches, b=5inches, P=19inches} \\ c=P-a-b \end{gathered}[/tex]Thus, we have;
[tex]\begin{gathered} c=19-7-5 \\ c=7 \end{gathered}[/tex]Thus, the length of the third side is 7inches
