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The circumference of a circle is 2{pi}r. So, for a semicircle it is half this, that is {pi}r.
The perimeter of the semicircle is the round bit ({pi}r) plus a diameter of the circle (2r)
perimeter = {pi}4 + 2 x 4
~= 20.6 in
Area of a circle is {pi}r2, so for a semicircle it is half this.
area ={pi}42 / 2
~= 25.1 in2.
What else can I help you with?
How do you find the area and perimeter of circle?
First you have to measure the diameter of the circle. The diameter is pi (pi is approximately 3.1415) times the diameter is the perimeter. Half the diameter is the radius and the area of a circle is pi times the radius squared. So for example, let us say that you have a circle with a diameter of 3 inches. The perimeter is then about 9.42 inches, and the area is about 7.07 square inches.
What is the area of a circle with a radius of 11 inches?
A circle with a radius of 11 inches has an area of 380.13 square inches.
What is the area of a circle with a radius of 18 inches?
A circle with a radius of 18 inches has an area of 1,017.88 square inches.
What is the area of a circle with a radius of 3in?
A circle with a radius of 3 inches has an area of 28.27 square inches.
What is the radius of a circle with an area of 706.50 square inches?
The radius of a circle with an area of 706.50 square inches is: 15 inches.
How do you find the area and perimeter of circle?
First you have to measure the diameter of the circle. The diameter is pi (pi is approximately 3.1415) times the diameter is the perimeter. Half the diameter is the radius and the area of a circle is pi times the radius squared. So for example, let us say that you have a circle with a diameter of 3 inches. The perimeter is then about 9.42 inches, and the area is about 7.07 square inches.
What is the area of a circle with a radius of 11 inches?
A circle with a radius of 11 inches has an area of 380.13 square inches.
What is the area of a circle if the radius is 2.5 inches?
The area of a circle if the radius is 2.5 inches is: 19.63 square inches.
What is the area of a circle with a radius of 18 inches?
A circle with a radius of 18 inches has an area of 1,017.88 square inches.
What is the area of a circle if the radius is 32 inches?
A circle with a radius of 32 inches has an area of 3,216.99 square inches.
What is the area of a circle with a radius of 3in?
A circle with a radius of 3 inches has an area of 28.27 square inches.
What is the radius of a circle with an area of 706.50 square inches?
The radius of a circle with an area of 706.50 square inches is: 15 inches.
What is the area of a circle whose radius is 6.6 inches?
A circle with a radius of 6.6 inches has an area of 136.85 square inches.
What is the area of a circle if the radius equals 5.1 inches?
A circle with a radius of 5.1 inches has an area of 81.71 square inches.
What is the radius of the area of a circle that is 380 sq inches?
The radius of a circle with an area of 380 sq inches is 11 inches.
What is the radius of a circle with an area of 35 square inches?
The radius of a circle with an area of 35 square inches is 3.34 inches.
Find the area and perimeter of a given circle?
If 'R' is the radius of the circle, then-- area of the circle is [ pi R2]-- perimeter of the circle is [ 2 pi R ]
