Wolfadaskies
  • Wolfadaskies
A tree needs to be staked with four wires. Each wire is attached to the trunk 3 feet above the ground, and then anchored to the ground 4 feet from the base of the tree. How much wire is needed for 7 trees?
Mathematics
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SOLVED
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chestercat
  • chestercat
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jchick
  • jchick
This looks like the place to use the Pythagorean theorem. Solve for c to find the length of wire for one stake. c^2 = a^2 + b^2 c^2 = 3^2 + b^2 c^2 = 9 + 16 c^2 = 25 c = ?
jchick
  • jchick
Can you do it from here?
Wolfadaskies
  • Wolfadaskies
So.. 3^2 x 4^2 = 25 Sq. rt. 25= 5 5 x 7 = 14? @jchick

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jchick
  • jchick
Plug it in and see if it works! :)
jchick
  • jchick
c=5,−5
Wolfadaskies
  • Wolfadaskies
But with that answer, would we multiply it by 7- since it's asking how much wire there should be for 7 trees? @jchick
jchick
  • jchick
Yes however 5 * 7 doesn't equal 14.
jchick
  • jchick
It equals 35.
Wolfadaskies
  • Wolfadaskies
Oop- my bad, I didn't see that I made that typo. Thank you for helping @jchick
jchick
  • jchick
No problem!
jchick
  • jchick
Oh just out of curiosity what type of math is this?
Wolfadaskies
  • Wolfadaskies
Geometry @jchick

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