-Welp-
  • -Welp-
How do I solve this?
Geometry
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
-Welp-
  • -Welp-
|dw:1438527061044:dw| "find the area of the triangle"
Rushwr
  • Rushwr
is that all ? No anyother angles given >
-Welp-
  • -Welp-
That's all they gave me to work with

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More answers

Rushwr
  • Rushwr
have they atleast mentioned about the left over angles being same or something?
-Welp-
  • -Welp-
|dw:1438527348097:dw| I got it backwards
-Welp-
  • -Welp-
*Sorry, I had it backwards
Rushwr
  • Rushwr
Soo do u want to know the whole procedure or just how to take the angles. !
-Welp-
  • -Welp-
The whole procedure please
anonymous
  • anonymous
You use cosine rule for this right?
Rushwr
  • Rushwr
That's what I was thinking too ! NOt sure though ! Still thinking ! WOuld you mind helping us @paki
anonymous
  • anonymous
\[a^2=b^2+c^2-2bc \cos A\]
anonymous
  • anonymous
\[a=\sqrt{12^2+8^2-2(12(8)\cos 81}\]
anonymous
  • anonymous
lets see what you get
-Welp-
  • -Welp-
I got 13.34033668 that doesn't seem right
anonymous
  • anonymous
you can verify it with sine rule now that you have 3 sides
amistre64
  • amistre64
how would you usually figure out the are of a triangle?
amistre64
  • amistre64
|dw:1438530093183:dw|
amistre64
  • amistre64
how would we determine the height? do we know any trig functions that we could employ?
triciaal
  • triciaal
another approach after using the cosine rule to get the 3rd side use Hero's formula to find the area knowing the 3 sides
triciaal
  • triciaal
|dw:1438531174056:dw|
-Welp-
  • -Welp-
"you can verify it with sine rule now that you have 3 sides" Formula for sine rule? "how would we determine the height? do we know any trig functions that we could employ?" I don't know "another approach after using the cosine rule to get the 3rd side use Hero's formula to find the area knowing the 3 sides " I don't know what I did wrong but I got 177
zepdrix
  • zepdrix
Formula for Sine Rule:\[\large\rm \frac{a}{\sin A}=\frac{b}{\sin B}\]|dw:1438535217539:dw|
zepdrix
  • zepdrix
Ya I like that Law of Cosines approach :o
-Welp-
  • -Welp-
=47.4 ^Is that correct?

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