Question

What is the length of side x in the triangle below?

Answer 1

b

Answer 2

@maxromeo are you just saying that because thats what i said?

Answer 3

no

Answer 4

im pretty sure thats right

Answer 5

you need to use tan
so you have tan(30) = x/11
which is the same as 11tan(30)
do it in calculator

Answer 6

maxromeo that is wrong

Answer 7

ivette is right.

Answer 8

u can also use sine rule

Answer 9

30-60-90 rule
http://upload.wikimedia.org/wikipedia/commons/4/45/30-60-90_triangle.jpg

Answer 10

sin rule won't work because you don't need hypothenus and you don't have the opposite side

Answer 11

i used the 30-60-90 rule i got 6.35

Answer 12

so, there

Answer 13

i also get 6.35 using sine rule

Answer 14

Since you are given the adjacent side of the angle of measure 30, you can use the trigonometric ratio:

tan 30 = x/11

because the tan function of an angle is the opposite side over the adjacent side. So,

x = (11)[tan(30)] -> (11)[sqrt(3)] / 3

Answer is C

Answer 15

is that coincidence? or is it correct? @ivettef365

Answer 16

Good luck to you in all of your studies, and thx for the recognition! @phknkayy

Answer 17

@ivettef365 ...why cant the sine rule be used??

Answer 18

How did you get to 6.35, with sin, how did you calculate?

Answer 19

sin = opp/hyp
you don't have the opposite neither the hyp

Answer 20

x/sin30 =11/sin60

Answer 21

Oh, I see you use the 60, that is ok

Answer 22

@tcarroll010 thank you

Answer 23

but still you need the x and that won't help

Answer 24

anyone know the interior angle rule?

Answer 25

oh ....11/sin60 X sin30= 6.35

Answer 26

uw! btw, the sine rule is also ok for finding the measure. One may or may not consider that a little more bulky since you have to use 2 trig ratios instead of one. But either method is fine.

Answer 27

@tcarroll010 .. thanks 4 verifying my method

Answer 28

uw! @physicsboffin

Answer 29

what does uw stand for?