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sum of the three side's length.

|dw:1347812022332:dw|

tips?

there is a 30-60-90 triangle, u know the property of this special triangle ??

yes

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?

use pythagoras theorem to find the side...\|dw:1347812215548:dw|

ahh

good ol' pythagorean theorem

so we have a 9-12-15 right triangle

3-4-5?

so the altitude becomes 12

now AD = 12
can u find all sides ?

30 degree side becomes 12 radical 3

AC equals 24

now

15+24=39

use pythagoras

39+9=48

48+12 radical 3?

is that really it?

No wonder this problem was so hard

I never used pythagorean theorem

derp

u did this by yourself :)

you have lots of geometry problem @luisz :p

ty

I know