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PinkyUSA18
25.01.2020 •
Mathematics
If the smallest angle of a triangle is 20 degrees and it is included between sides of 4 and 7, then (to the nearest tenth) the smallest side of the triangle is 3.2 - true or false?
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Ответ:
Al 'Kashi theorem says:
a²=4²+7²-2*4*7*cos 20°=12.37721...
==>a=3.518126381...≈3.5 ==>False.
Ответ:
The answer is False
Step-by-step explanation:
we know that
Applying the law of cosines, find the length of the third side of the triangle
In this problem we have
substitute the values and solve for c
therefore
Ответ: