What is the formula for surface area of a semicircle?

πr2/2
The formula which is used to calculate the area of the semicircle is expressed as, Area of semicircle (when the radius is given) = πr2/2, Area of semicircle (when the diameter is given) = πd2/8, where ‘r’ is the radius, and ‘d’ is the diameter.

What is the equation of a semicircle?

In general, when the equation (x – h)2 + ( y – k)2 = r 2 is solved for y, the result is a pair of equations in the form y = ±√r 2 – (x – h)2 + k. The equation with the positive square root describes the upper semicircle, and the equation with the negative square root describes the lower semicircle.

What is the area and perimeter of semicircle?

The formula to calculate the area of a semicircle with radius ‘r’ is given as 1/2 × (πr2) square units. The formula to calculate the perimeter of a semicircle with radius ‘r’ and diameter ‘d’ is given as πr + d units.

How do you find the surface area of a semicircular right prism?

  1. Volume = πr2((4/3)r + a)
  2. Surface Area = 2πr(2r + a)

Are semi circles function?

Semicircles are functions. Consider a circle with the equation x2 + y2 = r2.

What is the semicircle of a circle?

If a circle is cut into half along the diameter, that half-circle is called a semicircle. The two halves are of equal measure. A semicircle can also be referred to as a half-disk and it represents a circular paper plate folded into halves.

What is the perimeter of the semi circle?

The perimeter of a semicircle is half of the circumference plus the diameter.

What is the radius of a semicircle?

Semicircle is half the circle. The circles radius is simply half the diameter of the circle. Therefore, the radius of the semicircle is equal to the radius of the circle.

What is circumference of semicircle?

Find perimeter of a semicircle with radius of 2 cm Radius = r. = 2 cm. Perimeter of semicircle = r (𝜋 + 2) = 2 (3.14 + 2)