# How do you find the area of a rectangle with the diameter?

## How do you find the area of a rectangle with the diameter?

To find the area of your entire rectangle, you need to solve for Area = length x width, or A = l x w. Now that you’ve used the Pythagorean Theorem to find the second side length, you can solve for the area.

### How do you convert diameter to rectangle?

Changing a Circle to a Rectangle

1. Radius. R = D ÷ 2 where R = radius, D = diameter.
2. Area; A = π * D² ÷ 4 where A = area, π = 3.14159…, D = diameter.
3. Circumference; C = 2 * π * D ÷ 2 where C = circumference, π = 3.14159…., D = diameter.
4. Area. A = length * width.
5. Length.
6. Perimeter.

How do you calculate area from diameter?

The formula for calculating the area of a circle is A = π​r​2 where pi (π) equals 3.14 and the radius (​r​) is half the diameter.

What is the formula for the diameter of a rectangle?

You can use the Pythagorean theorem to estimate the diagonal of a rectangle, which can be expressed with the following formula: d² = l² + w² , and now you should know how to find the diagonal of a rectangle explicit formula – just take a square root: d = √(l² + w²) .

## What is a diameter rectangle?

The diameter of a rectangle is the length of a diagonal, or either of two long lines that join opposite corners. A diagonal divides a rectangle into two identical right angle triangles. In mathematics, the diagonal of a right angle triangle is called the hypotenuse.

### Can we find area of rectangle with diagonal?

You can’t. Both rectangles have the same diagonal but different areas. In fact, for any rectangle with diagonal d (which is known), we can find length and width as follows: This is simply the equation of a circle with radius .

What is 2pi R?

2 pi r is the way to find the circumference when you have the radius.

How do you find a circle’s area?

The area of a circle is pi times the radius squared (A = π r²). Learn how to use this formula to find the area of a circle when given the diameter.

## What is area of the rectangle?

The area of a rectangle (A) is the product of its length ‘a’ and width or breadth ‘b’. So, Area of Rectangle = (a × b) square units.

### What is the diagonal formula of rectangle?

In the diagonal of a rectangle formula, ‘w’ refers to the width of the rectangle. The formula is given as, d = √( l2 + w2), where, l is length of the rectangle and w is width of the rectangle.

How do you calculate a diameter?

How To Calculate Diameter?

1. Diameter = Circumference ÷ π (when the circumference is given)