Mathematics
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OpenStudy (xxcecelovxx):
I need help with Geometry!
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OpenStudy (xxcecelovxx):
Using a trigonometric ratio, what is the value of x rounded to the nearest tenth? The figure is not drawn to scale.
jhonyy9 (jhonyy9):
how many degree has the 3rd angle ?
OpenStudy (xxcecelovxx):
which 3rd angle?
Vocaloid (vocaloid):
the angle that isn't marked
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OpenStudy (xxcecelovxx):
90 degrees.
OpenStudy (xxcecelovxx):
right?
Vocaloid (vocaloid):
|dw:1464990450720:dw|
Vocaloid (vocaloid):
the other one
OpenStudy (xxcecelovxx):
It doesn't say.
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Vocaloid (vocaloid):
sum of angles in a triangle = 180
Vocaloid (vocaloid):
so the missing angle is...?
OpenStudy (xxcecelovxx):
70
Vocaloid (vocaloid):
good
we can do a trig ratio
tan(70) = x/10
solve for x
OpenStudy (xxcecelovxx):
how?
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OpenStudy (xxcecelovxx):
I thought to cross multiply you needed them to both have a denominator?
Vocaloid (vocaloid):
no
Vocaloid (vocaloid):
you don't need a common denominator for cross multiplying
Vocaloid (vocaloid):
tan(70) = x/10
x = 10*tan(70) = ?
use a calculator, make sure it's on degree mode
OpenStudy (xxcecelovxx):
12.21?
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OpenStudy (xxcecelovxx):
the options are 27.5 or 3.6
Vocaloid (vocaloid):
here's a calculator if you need one
OpenStudy (xxcecelovxx):
I did that and got 12.21
Vocaloid (vocaloid):
type in 10
then press the tan button
then enter 70
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OpenStudy (xxcecelovxx):
thank you so much!!!!