SOLUTION: The perimeter of a triangle is 26 millimeters. The length of the first side is twice the length of the second side. The length of the third side is 5 more than the length of the se

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Question 1026411: The perimeter of a triangle is 26 millimeters. The length of the first side is twice the length of the second side. The length of the third side is 5 more than the length of the second side. Find the side length of the triangle. Then classify the triangle by its side lengths.
Found 2 solutions by Cromlix, mananth:
Answer by Cromlix(4381) (Show Source):
You can put this solution on YOUR website!
Hi there,
Make the second side = x
..........
1st side = 2x
2nd side = x
3rd side = x + 5
Perimeter = 1st side + 2nd side + 3rd side
26 = 2x + x + x + 5
Collect like terms:
4x = 26 - 5
4x = 21
x = 5.25mm
...........
1st side = 10.5mm
2nd side = 5.25mm
3rd side = 10.25mm
...Total = 26mm
Hope this helps :-)

Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website!
let second side be x
first side =2x
third side = x+5
Add them up
x+x+5 +2x =26
4x+5=26
4x = 21
x= 21/4
x= 5.25
2x = 10.5
x+5 = 10.25
scalene triangle