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Q: The area of the semicircle is increasing at a rate of 1 cm2sec when the radius of the semicircle is 3cm?

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Area of a semicircle = (pi*radius^2)/2

50.25cm

Area in square inches = (pi*radius^2)/2

2pi sq cm

The area of a semicircle is one-half the area of a circle. it is equal to (pi/2)r^2, where r is the radius.

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The area of a semicircle is half of the area of a circle. The area of a circle is pi x radius x radius. So the area of a semicircle is 1/2 x pi x radius x radius or (pi x radius x radius) / 2.

Area of a semicircle = (pi*radius^2)/2

50.25cm

That would depend on the radius which has not been given but the area of the semi circle will be (pi*radius squared)/2

Pi*radius squared is how to find the area of a semicircle

Area in square inches = (pi*radius^2)/2

2pi sq cm

The equation for area of a circle is A=pi x R x R. A semicircle is half a circle, so we calculate the area of a circle and divide by 2. The area of the circle would be approximately 1384.74. Thus the area of the semicircle would be 692.37.

In a semicircle, the diameter is the straight line. It is also equal to double the radius, and that property allows it to be used when calculating area and circumference.

An area of a circle is pi*r2 - so an area of a semicircle is 0.5*pi*r2: 0.5*3.14*42 = 25.13 square meters

a semicircle is half of a circle... so like a circle cut in half, in a straight line. just for some information you may also need in the future: area of a semicircle: multiply the radius by itself and then multiply that by pi (approx. 3.14). divide that by 2. perimeter (circumference) of a semicircle: pi times radius. hope that helps.

The area of a semicircle is one-half the area of a circle. it is equal to (pi/2)r^2, where r is the radius.