muratm
25.08.2019 •
Mathematics
a 45° sector in a circle has an area of 43.2 cm².
what is the area of the circle?
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Ответ:
45 out of 360 is th fraction that 43.2 is out of the whole circle
45/360=43.2/whole
0.125=43.2/whole
multiply both sides by whole
0.125 times whole=43.2
divide both sides by 0.125
whole=345.6
answer is 345.6 cm^2
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