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donny34
29.01.2020 •
Mathematics
In the square below the four quarter circles are congruent. find the area of the shaded region.
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Ответ:
The area of the square is 8*8 = 64 square units
The circle has a radius of 8/2 = 4 units. Use r = 4 and plug this into the area of a circle formula
A = pi*r^2
A = pi*4^2
A = pi*16
A = 16pi
Now subtract the two areas
(area of square) - (area of circle) = 64 - 16pi
The exact answer, in terms of pi, is 64 - 16pi
If your teacher wants you to find the approximate decimal version, then you would use a calculator to find that 64 - 16pi = 13.7345175 approximately. If you end up going with the approximate answer, be sure to follow the instructions on what your teacher wants with rounding.
Ответ:
(11+21)-(3-101)=(11+21-3-10=(11-3)+(21-101=8-18=53