anonymous
  • anonymous
the coordinates of the of the vertices of a triangle are A(1,3), B(9,10), and C(11,18). find the perimeter of triangle ABC. Find the perimeter of the triangle when the coordinates are multiplied by 3.
Mathematics
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anonymous
  • anonymous
the coordinates of the of the vertices of a triangle are A(1,3), B(9,10), and C(11,18). find the perimeter of triangle ABC. Find the perimeter of the triangle when the coordinates are multiplied by 3.
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
anyone please help meh?
sohailiftikhar
  • sohailiftikhar
do you know the formula of perimeter of triangle ?
anonymous
  • anonymous
you um add the three sides up?

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sohailiftikhar
  • sohailiftikhar
wait
anonymous
  • anonymous
ok
anonymous
  • anonymous
have you finally found an answer? it's 2 here :O
anonymous
  • anonymous
yayyyyyyyyyyyyyy
sohailiftikhar
  • sohailiftikhar
first answer is 36.89
anonymous
  • anonymous
at least give me the three numbers to add...
sohailiftikhar
  • sohailiftikhar
ok
sohailiftikhar
  • sohailiftikhar
A(1,3), B(9,10), and C(11,18). then the sides will be AB,BC,CA
sohailiftikhar
  • sohailiftikhar
so now you can find the sides ig
anonymous
  • anonymous
just need the three sides' number that all
sohailiftikhar
  • sohailiftikhar
AB=B-A=(9-1)(10-7)=8i+3j now find it's magnitude
anonymous
  • anonymous
btw when the sides all multiply by 3 the perometer just get multiplied by 3 right?
anonymous
  • anonymous
does it have to be that complicated?
sohailiftikhar
  • sohailiftikhar
yes
sohailiftikhar
  • sohailiftikhar
first you have to find sides by distance formula then have to add then that's all .
anonymous
  • anonymous
\[\sqrt{(y_1+y_2)^2+(x_1+x_2)^2}\]
anonymous
  • anonymous
that's the formula for finding a side i THINK
sohailiftikhar
  • sohailiftikhar
yes
anonymous
  • anonymous
but when i plugged it in i got \(\sqrt{113}\)
anonymous
  • anonymous
but how do u add them TOGETHER :O
anonymous
  • anonymous
well... you are a HUMAN calculator, right?
anonymous
  • anonymous
:P
anonymous
  • anonymous
Use matrix method
anonymous
  • anonymous
?
anonymous
  • anonymous
here's what i need: i need the three numbers for the sides of the triangle, the answers for the 3 questions, and a explanation for the last question.
anonymous
  • anonymous
Well let me think 2 mins plz
anonymous
  • anonymous
ok
anonymous
  • anonymous
the formula to find the sides are -- Distance from A to B = |dw:1441269476718:dw| In that way you can find all the sides and then for the parameter the formula is , parameter = AB+BC+AC
anonymous
  • anonymous
and i know that.
anonymous
  • anonymous
then what's the problem solve it
anonymous
  • anonymous
XD XD
anonymous
  • anonymous
idk i get a diff answer every time that's why i needa check the sides and the answer bruh!
anonymous
  • anonymous
well tell me your answer. I am solving it
anonymous
  • anonymous
well which one? i have like 20 different answers
anonymous
  • anonymous
well is there root of(113)?
anonymous
  • anonymous
no...
anonymous
  • anonymous
side AB = root of (113)
anonymous
  • anonymous
Side BC= root of (68)
anonymous
  • anonymous
ok.
anonymous
  • anonymous
and side CA = root of (325)
anonymous
  • anonymous
then the perimeter is [ root of 113+ root of 68+root of 325]
anonymous
  • anonymous
ok...
anonymous
  • anonymous
are you able to do the sum?
sohailiftikhar
  • sohailiftikhar
and answer is 36.89
sohailiftikhar
  • sohailiftikhar
which i have told before
anonymous
  • anonymous
its not likie absolute tho like ther eare decimals and stuff
anonymous
  • anonymous
the answer is 36.90

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