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anonymous
 one year ago
This question is based on Heron's Formula :
In a triangle ABC, it is given that (s  a) = 5, (s  b) = 3, (s  c) = 1 where s is the semi perimeter and a, b, c are the sides of the triangle. If the area of the triangle is 3sqrt10 sq. units then the perimeter of the triangle is what???
anonymous
 one year ago
This question is based on Heron's Formula : In a triangle ABC, it is given that (s  a) = 5, (s  b) = 3, (s  c) = 1 where s is the semi perimeter and a, b, c are the sides of the triangle. If the area of the triangle is 3sqrt10 sq. units then the perimeter of the triangle is what???

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phi
 one year ago
Best ResponseYou've already chosen the best response.1first, write down Heron's formula

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[Area = \sqrt{s(sa)(sb)(sc)}\]

phi
 one year ago
Best ResponseYou've already chosen the best response.1now fill in what you know (from the question)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I substituted vales and found s=6 but it does not work ......

phi
 one year ago
Best ResponseYou've already chosen the best response.1s= is (a+b+c)/2 a+b+c is the perimeter you want 2*s for the answer

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I have already tried by substituting values and got s=6 but it is not correct

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Options for answer are: a) sqrt15 b) 9 c) 27 d) 18

phi
 one year ago
Best ResponseYou've already chosen the best response.1in that case you are the victim of a typo, because the perimeter is 12

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0but if you take s=6 and find values of a, b and c and then find s by a+b+c/2, you get a different value of s

phi
 one year ago
Best ResponseYou've already chosen the best response.1even worse, we find a=1, b= 3 and c= 5 and that cannot be a triangle. (c must be less than 4 to be a triangle)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Right!! I was wondering whether I was wrong in my process or was there a mistake in the question itself.........

phi
 one year ago
Best ResponseYou've already chosen the best response.1there is something wrong with the question, as it poses an impossible situation I assume there is a typo in the original givens, but it is difficult (for me) to guess what they really meant.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Thanks anyway for your help.....

phi
 one year ago
Best ResponseYou've already chosen the best response.1You can ask your teacher about this one (if you have a teacher).

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0This question is from last year's paper of some other school.......
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