The first side of a triangle measures 4 in. less than the second side, the third side is 3 in. more than the first side, and the perimeter is 15 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? s - 4 s - 1 s + 3

Lets label each side first:

r = 1st side

s= 2nd side

t= 3rd side

Now lets find the equations to each:

s - 4 = r

r +3 = t

r+s+t = 15

It wants to know which equation would represent the third side "t" . We can find the equation that solves for it ; in other words the equation that has "t" isolated and that is the second equation. We can sub in the first one into it:

s - 4 = r

r +3 = t

plug the first one into the second one by substituting the r, we should get:

(s-4)+3=t s-1=t or "s -1"

entering that problem on the tube might get you an answer

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: