Question

GIVE MEDAL AND BECOME FAN!!!


In ∆ABC, BC = 4 centimeters, m B = m C, and m A = 20°. What is AC to two decimal places?

9.32 centimeters

10.01 centimeters

11.52 centimeters

12.09 centimeters

Answer 1

OMG love ur hair!!!

Answer 2

HI!!
thanks !

Answer 3

does that picture look right?

Answer 4

yes but its confusing

Answer 5

those two bottom angles are equal

Answer 6

ok

Answer 7

im fanning you :)

Answer 8

no that is wrong, each are 80

Answer 9

since \[80+80+20=180\]

Answer 10

you good with that? now it is time for the law of sines

Answer 11

yea i did and im ready >:)

Answer 12

\[\frac{AC}{\sin(80)}=\frac{4}{\sin(20)}\]

Answer 13

so
\[AC=\frac{4\sin(80)}{\sin(20)}\]

Answer 14

do i divide tht?

Answer 15

use this
http://www.wolframalpha.com/input/?i=4sin%2880%29%2Fsin%2820%29

Answer 16

you need a calculator to do it anyway might as well use wolfram
if you scroll down you will see the answer is about \(11.52\)

Answer 17

thx girl :)

Answer 18

\[\huge \color\magenta\heartsuit\]