anonymous
  • anonymous
what is the perimeter of triangle ABC?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
sum of the three side's length.
anonymous
  • anonymous
|dw:1347812022332:dw|
anonymous
  • anonymous
tips?

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More answers

hartnn
  • hartnn
there is a 30-60-90 triangle, u know the property of this special triangle ??
anonymous
  • anonymous
yes
anonymous
  • anonymous
but I know none of the sides
anonymous
  • anonymous
And I do not know the angles for the other triangle with sides
anonymous
  • anonymous
I could assume that triangle ABC is a 30-60-90, right?
anonymous
  • anonymous
C=30 degrees
anonymous
  • anonymous
A=60 degrees
anonymous
  • anonymous
B=90 degrees?
anonymous
  • anonymous
calculate the length of perpendicular from A to BC using Pythagoras theorem. then use trigonometry relations to calculate AC. rest you can get...
hartnn
  • hartnn
use pythagoras theorem to find the side...\|dw:1347812215548:dw|
anonymous
  • anonymous
ahh
anonymous
  • anonymous
good ol' pythagorean theorem
anonymous
  • anonymous
so we have a 9-12-15 right triangle
anonymous
  • anonymous
3-4-5?
anonymous
  • anonymous
so the altitude becomes 12
hartnn
  • hartnn
now AD = 12 can u find all sides ?
anonymous
  • anonymous
30 degree side becomes 12 radical 3
anonymous
  • anonymous
AC equals 24
anonymous
  • anonymous
now
anonymous
  • anonymous
15+24=39
hartnn
  • hartnn
use pythagoras
anonymous
  • anonymous
39+9=48
anonymous
  • anonymous
48+12 radical 3?
anonymous
  • anonymous
is that really it?
anonymous
  • anonymous
No wonder this problem was so hard
anonymous
  • anonymous
I never used pythagorean theorem
anonymous
  • anonymous
derp
hartnn
  • hartnn
u did this by yourself :)
chihiroasleaf
  • chihiroasleaf
you have lots of geometry problem @luisz :p
anonymous
  • anonymous
ty
anonymous
  • anonymous
I know

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