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## What is the area of the semicircle in square feet?

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.

#### How do you find the area and perimeter of a 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.

**What is the formula for a semi circle?**

It is expressed as ‘Area of a semicircle formula = πR2/ 2 square units’, where, R = radius of a semicircle. π(pi) is 22/7 or 3.142 approximately.

**What is the formula for perimeter of a half circle?**

πR + 2R

The perimeter of a semicircle formula is defined as the sum of half of the circumference of the circle and the diameter of a circle. It is expressed as, The circumference of a circle is C = πd or C = 2πR. The perimeter of a semicircle formula = (πR + 2R) units, or R(π + 2).

## What is the equation for a semi circle?

### What is the perimeter of a half circle?

πr + 2r

Perimeter of Semicircle The perimeter of a semicircle is the sum of half of the circumference of the circle and its diameter. As the perimeter of a circle is 2πr or πd. So, the perimeter of a semicircle is 1/2 (πd) + d or πr + 2r, where r is the radius.

#### What is the perimeter of a semicircle calculator?

The perimeter of the semi-circle = πr + 2r units, where ‘r is the radius of the semi-circle.

**What is the perimeter of half circle?**

**How do you find the Area and perimeter of a semicircle?**

## What is the perimeter of half semicircle?

The formula for the perimeter of the semicircle is the sum of the length of the diameter and half the circumference of the original circle. It is written as Perimeter = (πr + 2r), where “r” is the radius of the semicircle and π is a constant with a value of 22/7.

### How do I find the perimeter of a half circle?

#### How do you find the square footage of a half circle?

Remember the square footage formula of an ordinary circle, which is SF=πr². Divide it by two, as you only want the square footage of a half-circle. The result should be SF=πr²/2. That is the square footage of a half-circle for any radius.

**How to calculate the area of a semicircle (half circle)?**

How to calculate the area of a semicircle (half circle) – YouTube To work out the area of a semicircle you can use the formula A = (Pi*r^2)/2. This is because the area of a full circle is A = Pi*r^2 and a semicircle is half… To work out the area of a semicircle you can use the formula A = (Pi*r^2)/2.

**What is the formula to find the Square area of a circle?**

The formula: Area of a Circle = π x (Diameter/2)^2 π = 3.142 Answer = (π x (Diameter/2)^2) square area

## How do you calculate the square feet of a shape?

If the shape you are about to calculate is an irregular one or if it includes few standard geometrical shapes together, then you probably can cut it into a few simple shapes, then calculate their footage separately, then add them together to get the total square foot value.