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what is the perimeter of triangle ABC?

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sum of the three side's length.

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Other answers:

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

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