Answer:
the required matrix is can be given as
Just place dots where the points are saying, the first number is always x aka the horizontal line ( the one that is going down) and the second number is y aka the vertical line ( the one going up)
The point would be on the -2.
Circumference formula tells you

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The formula to find the area of a circle is

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Answer:
w=12
you move and subtract 4 from 16