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To find the area of a semicircle, use the formula 1/2(pi x r^2). You need the value of "r," or radius of the circle, and pi.


The area of a semicircle is (?*R*R)/2. This means the radius of the semicircle is squared, multiplied by the constant pi, then divided by 2.


The perimeter of a semicircle is 1/2 of the circumference of the corresponding complete circle plus the diameter of the circle. The distance around the outside of a semicircle is generally called its perimeter.


One simple way to calculate the perimeter of a circle is to multiply its radius by two and further multiply the product by pi. You need a ruler and a divider to accomplish this task.


Calculating the area of polygons requires specific formula, while calculating perimeters simply involves the addition of all sides of a polygon. Calculating the perimeter or area of circles and other monogons involve formulas that use the mathematical concepts of pi and...


The perimeter of a parallelogram is equal to the sum of the four lengths that make up the parallelogram. Instead of adding up all four sides, a person can find the perimeter by adding the width and the height and then multiplying the sum by two.


The perimeter of a rectangle is the sum of the length of all four sides. Alternate formulas for finding the perimeter are 2(length + width) and 2 x length + 2 x width.