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The best and most correct answer among the choices provided by the question is </span><span>B.276 m2
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Hope my answer would be a great help for you. </span>
The answer is A( +7) x (-5)
I think that she started with 10.. I'm not 100% sure, though
Answer:
Step-by-step explanation:
Given
Let the three sides be represented with A, B, C
Let the angles be represented with
[See Attachment for Triangle]
What the question is to calculate the third length (Side B) and the other 2 angles ()
Solving for Side B;
When two angles of a triangle are known, the third side is calculated as thus;
Substitute: , ;
Take Square root of both sides
<em>(Approximated)</em>
Calculating Angle
Substitute: , ;
Subtract 180 from both sides
Divide both sides by -144
Take arccos of both sides
<em>(Approximated)</em>
Calculating
Sum of angles in a triangle = 180
Hence;
Make the subject of formula