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Mathematics 15 Online
OpenStudy (xxcecelovxx):

I need help with Geometry!

OpenStudy (xxcecelovxx):

Using a trigonometric ratio, what is the value of x rounded to the nearest tenth? The figure is not drawn to scale.

OpenStudy (xxcecelovxx):

https://gyazo.com/ab0f7ac80dc08a3de42a89cd527455cf

jhonyy9 (jhonyy9):

how many degree has the 3rd angle ?

OpenStudy (xxcecelovxx):

which 3rd angle?

Vocaloid (vocaloid):

the angle that isn't marked

OpenStudy (xxcecelovxx):

90 degrees.

OpenStudy (xxcecelovxx):

right?

Vocaloid (vocaloid):

|dw:1464990450720:dw|

Vocaloid (vocaloid):

the other one

OpenStudy (xxcecelovxx):

It doesn't say.

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?

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?

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

OpenStudy (xxcecelovxx):

thank you so much!!!!

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