SOLUTION: My fourth grade daughter came home with this math question and I couldn't figure it out, please help me to explain to her how it's done. Here is the question The perimeter of a

Question 375170: My fourth grade daughter came home with this math question and I couldn't figure it out, please help me to explain to her how it's done. Here is the question
The perimeter of a triangle is 30", the first side of the triangle is 1" longer than the second side, the second side is 7" longer than the third side, what is the length of each side of the triangle.
Thank you in advance,
Jamie
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
The perimeter of a triangle is 30", the first side of the triangle is 1" longer than the second side, the second side is 7" longer than the third side, what is the length of each side of the triangle.
...
let the third side be x "
second side is 7 " longer = x+7
First side is 1" greater than second side = (x+7)+1=x+8
..
Perimeter = sum of all sides
x+x+7 + x+8 = 30
x+x+x+15=30
3x+15=30
-15
3x=15
/3
x= 5". ----------- third side
second side = x+7 = 5+7 =12"
third side = x+8 = 5+8 = 13 "
...
CHECK
5+12+13=30"
...
m.ananth@hotmail.ca
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