Question

The first side of a triangle measures 5 in. less than the second side, the third side is 3 in. more than the first side, and the perimeter is 17 in. How long is the third side? If S represents the length of the second side, which of the following represents the length of the third side?
A.)S-5
B.)S-2
C.)S+3

Answer 1

P = a + s + c....a = 1st side, s = 2nd side, c = 3rd side
a = s - 5
c = a + 3......c = s - 5 + 3 = s - 2

so ur answer is : s - 2

Answer 2

X is the second side. Side 1 is s-5. side 3 is s-2 (s-5+3). They all must add up to 17. Well there is your answer right there. S-2