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Shalnov [3]
3 years ago
7

The answer to this question in my math class at school.

Mathematics
1 answer:
gregori [183]3 years ago
8 0

Answer:

2nd

Step-by-step explanation:

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In the following triangle, a= ? , b= 2cm.

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Now, we know that sum of the interior angles of the triangle = 180°

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m< A= 180- 120° = 60°

\frac{ \sin( A) }{a}  =  \frac{ \sin(B) }{b}

\frac{ \sin(60) }{a}  =  \frac{ \sin(105) }{2}

a =  \frac{ \sin(60) }{ \sin(105) }  \times 2

a = 1.79

a = 1.8

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Step-by-step explanation:

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