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Mathematics 18 Online
OpenStudy (anonymous):

SOMEONE ANYONE PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! How is the area of a semicircle found? Take half of the circumference. Use the area formula with r/2. Take half the area of the whole circle. Divide the area of the whole circle by 4.

OpenStudy (anonymous):

@DUDE..IM..A..DUCK

OpenStudy (anonymous):

@Secret-Ninja

OpenStudy (anonymous):

the answer to this is

OpenStudy (anonymous):

The area of a semi circle is 1/2 x pi x r2 Area of circle is pi (3.14) x square of radius. Divide that by two to get half-circle. First you figure out what the area would be if it were an entire circle using the formula pi times the radius squared. Pi = approx 3.1416. Then if you know the angle (in degrees) that creates the semi circle divide that number by 360. Then multiply that number by the area of the circle. The formula for the area of a circle is A = πr2 where r is the radius and π (Pi) is the ratio of the circumference of a circle to its diameter. The area of a semicircle is thus half this quantity = πr2/2

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