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Salsk061 [2.6K]
3 years ago
8

The longest side of a triangle is six more units than the shortest side. The third side is twice the length of the shortest side

. If the perimeter of the triangle is 26 units, write and solve an equation to fine the lengths of all three sides of the triangle.
Mathematics
1 answer:
rusak2 [61]3 years ago
5 0

The perimeter is the total of adding all of the side lengths together.


s = shortest side

L = longest side

T = third side


L = s + 6  (longest side is 6 more units than the shortest side)

T = 2s  (the third side is twice the length of the shortest side)


Equation is:

P = s + L + T


You can plug in the equations of L = s + 6 and T = 2s into "L" and "T":


P = s + L + T

P = s + (s + 6) + (2s)      You know the perimeter is 26, so you can plug it into P

26 = s + s + 6 + 2s

26 = 2s + 6 + 2s

26 = 4s + 6  

20 = 4s

5 = s


Now that you know s, you can plug it into L = s + 6 and T = 2s

L = s + 6

L = 5 + 6

L = 11


T = 2s

T = 2(5)

T = 10


The shortest side is 5 units, the longest side is 11 units, the third side is 10 units


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