anonymous
  • anonymous
If a2 + b2 + c2 = 250 and ab + bc + ca = 3, then a + b + c is
Mathematics
  • Stacey Warren - Expert brainly.com
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chestercat
  • chestercat
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anonymous
  • anonymous
shayan use here the formula of (a+b+c)^2 this would help
asnaseer
  • asnaseer
follow suggestion by waheedahmed and answer should become abvious
anonymous
  • anonymous
thanks a lot 16 ans

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anonymous
  • anonymous
or -16?
anonymous
  • anonymous
Area of triangle, having sides as 8, 11 and the perimeter 32 is
anonymous
  • anonymous
(a + b + c)^2= a^2 + b^2 + c^2 + 2(ab + bc + ca), since, a^2 + b^2 + c^2 = 250 and ab + bc + ca = 3, (a + b + c)^2 = 250 + 2(3) = 256 = 16^2 therefore: a + b + c = 16 ,.
anonymous
  • anonymous
why not -16?
anonymous
  • anonymous
Area of triangle, having sides as 8, 11 and the perimeter 32 is
anonymous
  • anonymous
area is always taken positive shayanreloaded thats why...
anonymous
  • anonymous
lol these are 2 dif qs
anonymous
  • anonymous
i have given u the answer of above shayan
anonymous
  • anonymous
not the second one
anonymous
  • anonymous
for first -16 is possible right? and help wid 2nd
anonymous
  • anonymous
you had asked why not -16 for that
anonymous
  • anonymous
no area cant be -16 shayan
anonymous
  • anonymous
this is fr 1st question which is not bout area
anonymous
  • anonymous
ok my mistake both 16 and -16 are possible sorry about that shayan ...i hope u would understand
anonymous
  • anonymous
yeah i do now 2nd ques lol
anonymous
  • anonymous
do you know the formula for perimeter shayan the solution is in it
anonymous
  • anonymous
hm add sides?
anonymous
  • anonymous
3rd side is 13 i dont think i rem. herons formula
anonymous
  • anonymous
after getting third side u will find s=a+b+c/2
anonymous
  • anonymous
16 ok
anonymous
  • anonymous
16 is the answer
anonymous
  • anonymous
now use this A=squareroot(s(s-a)(s-b)(s-c)
anonymous
  • anonymous
did u get the answer shayan
anonymous
  • anonymous
43.8?

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