a1234
  • a1234
A parallelogram has an angle of 50 degs and sides of 5 and 10 inches. What are the lengths of the diagonals? Round each to the nearest tenth of an inch. Are these 13.7 and 7.8? Not quite sure.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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ChantySquirrel1129**
  • ChantySquirrel1129**
|dw:1444540380146:dw|
a1234
  • a1234
yes
ChantySquirrel1129**
  • ChantySquirrel1129**
Okie dokie c: Diagonal is this, right? :|dw:1444540562960:dw|

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ChantySquirrel1129**
  • ChantySquirrel1129**
*diagonals are
a1234
  • a1234
yup
ChantySquirrel1129**
  • ChantySquirrel1129**
Lol I'm trying to remember doing this stuff :p Show me where you got your answers from please c:
a1234
  • a1234
I did x^2 = 5^2+10^2-2*5*10 cos50° and y^2 = 5^2+10^2-2 * 5*10 cos130°
a1234
  • a1234
law of cosines
ChantySquirrel1129**
  • ChantySquirrel1129**
You got the 7.8 diagonal right though c:
ChantySquirrel1129**
  • ChantySquirrel1129**
But the other one, 13.7, you were a bit off :p
a1234
  • a1234
why?
ChantySquirrel1129**
  • ChantySquirrel1129**
Well I believe the correct answer is 13.76, which would round to 13.8 c:

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