anonymous
  • anonymous
In ABC ,
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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ganeshie8
  • ganeshie8
draw the triangle and label things
anonymous
  • anonymous
i tried that i couldnt figure it out?
ganeshie8
  • ganeshie8
since they say

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ganeshie8
  • ganeshie8
|dw:1370188198217:dw|
ganeshie8
  • ganeshie8
we label A and B as we wish
ganeshie8
  • ganeshie8
|dw:1370188264147:dw|
ganeshie8
  • ganeshie8
now label these :- a = 3, c = 19
ganeshie8
  • ganeshie8
can u do that.. :)
anonymous
  • anonymous
ok
ganeshie8
  • ganeshie8
hey thats wrong
ganeshie8
  • ganeshie8
small letters (a, b, c.. ) indicate side lengths capital letters(A, B, C..) indicate angles
anonymous
  • anonymous
Then what do i do?
ganeshie8
  • ganeshie8
|dw:1370188535949:dw|
ganeshie8
  • ganeshie8
a=3 is the length of side opposite to angle A
ganeshie8
  • ganeshie8
c=19 is the length of side opposite to angle C
ganeshie8
  • ganeshie8
the correct labeling ive shown above. see if it makes sense. we can use that triangle to solve the problem
anonymous
  • anonymous
ok i get that
ganeshie8
  • ganeshie8
great, u knw pythagora ?
anonymous
  • anonymous
a^2 + b^2 = c^2 right?
ganeshie8
  • ganeshie8
yes use it and find the third side
ganeshie8
  • ganeshie8
|dw:1370188846667:dw|
ganeshie8
  • ganeshie8
3^2 + AC^2 = 19^2 AC^2 = 19^2 - 3^2 = 361 - 9 = 352 AC = ?
anonymous
  • anonymous
one sec
ganeshie8
  • ganeshie8
okay
anonymous
  • anonymous
i thought that you would put it like 3^2 + B^2 = 19^2 and than like figure out what B would be?
ganeshie8
  • ganeshie8
yes, but be careful its the side, not the angle. so it must be small b
ganeshie8
  • ganeshie8
3^2 + b^2 = 19^2
ganeshie8
  • ganeshie8
can u solve b
anonymous
  • anonymous
so i did b^2 = 19^2 - 3^2 = 361 - 9 =352 so my next step would be what though im really sorry i am horriable at algebra
ganeshie8
  • ganeshie8
its ok :) we got this : b^2 = 352
ganeshie8
  • ganeshie8
we want b, so take squareroot of that
ganeshie8
  • ganeshie8
b = sqrt(352)
ganeshie8
  • ganeshie8
use ur calculator and tell me wat u get for b
anonymous
  • anonymous
so 18.8?
ganeshie8
  • ganeshie8
perfect ! lets find the other two angles
ganeshie8
  • ganeshie8
|dw:1370189599127:dw|
ganeshie8
  • ganeshie8
from the figure, lets take tan ratio. \(\tan A = \frac{3}{18.8}\) \(A = \arctan(\frac{3}{18.8})\)
ganeshie8
  • ganeshie8
do u knw how to take arctan in ur calculator ?
anonymous
  • anonymous
no?
ganeshie8
  • ganeshie8
use wolfram :- http://www.wolframalpha.com/input/?i=arctan%283%2F18.8%29
anonymous
  • anonymous
ok
anonymous
  • anonymous
it wont come up?
ganeshie8
  • ganeshie8
click that link, it shows A = 9.1
ganeshie8
  • ganeshie8
by triangle sum property other angle B = 80.9
ganeshie8
  • ganeshie8
we're done.
anonymous
  • anonymous
i did click the link it just wont open it goes 2 the page but nothings there
anonymous
  • anonymous
so the answer is B. thank you sooo much i cant thank you enough by any chance would you like to help me with some more?
ganeshie8
  • ganeshie8
1 Attachment
ganeshie8
  • ganeshie8
np, answer is A : A. m
ganeshie8
  • ganeshie8
A. m
anonymous
  • anonymous
woops thats what i meant sorry lol :)
ganeshie8
  • ganeshie8
great :) post it, il see if i can...:)
anonymous
  • anonymous
alright one sec
ganeshie8
  • ganeshie8
maybe post it as a new q, if im not able to help, someone else would :)
anonymous
  • anonymous
alright thanks again
ganeshie8
  • ganeshie8
np =)
anonymous
  • anonymous
;) i posted another

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