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Grace [21]
3 years ago
13

Find the cosine of angle A to the nearest 100th.

Mathematics
1 answer:
Sauron [17]3 years ago
4 0

Answer:

{ \tt{ \cos(A) =  \frac{ \sqrt{700} }{40}  }} \\  { \tt{ \cos(A) = 0.66 }}

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Step-by-step explanation:

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Plz help ASAP!! Explain your answer! I will mark at brainliest!!! And don’t copy anybody else’s answer
Klio2033 [76]

Answer:

No, it is not a square

Step-by-step explanation:

If one wall is 19", that would mean the wall perpendicular to this wall is also 19" (in fact all of the walls would be 19"!) If this was a square, then the diagonal we draw at 20.62" would serve as the hypotenuse of a right triangle.  One wall would serve as a leg, and another wall as another leg.  If this is a square, then the Pythagorean's Theorem would be satisfied when we plug in the 2 wall measures for a and b, and the diagonal for c:

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We need to see if this is a true statement.  If the left side equals the right side, then the 2 legs of the right triangle are the same length, and the room, then is a square.

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Is this true?  Does 722 = 425.1844?  Definitely not.  That means that the room is not a square.

8 0
3 years ago
You are given that<br> 4a-2b = 10<br> (a)<br> Write down the value of<br> 2a - b
Simora [160]

Answer:

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Step-by-step explanation:

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6 0
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