Question 765457: find the area triangle of sides 5cm,6cm,7cm
Found 3 solutions by Alan3354, jim_thompson5910, tommyt3rd:
Answer by Alan3354(69443)   (Show Source):
Answer by jim_thompson5910(35256)  (Show Source):
You can put this solution on YOUR website!
| Solved by pluggable solver: Hero's (or Heron's) Formula (Used to Find the Area of a Triangle Given its Three Sides) |
In order to find the area of a triangle 'A' with side lengths of 'a', 'b', and 'c', we can use Hero's Formula:
 where S is the semiperimeter and it is defined by 
Note: "semi" means half. So the semiperimeter is half the perimeter.
So let's first calculate the semiperimeter S:
Start with the semiperimeter formula.
 Plug in  ,  , and  .
 Add.
 Divide.
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Now move onto Hero's Formula.
 Plug in , , , and .
 Subtract.
 Multiply.
 Take the square root of  to get  .
So the area of the triangle with side lengths of , , and is roughly square units.
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Answer by tommyt3rd(5050)  (Show Source):
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