# How do you find the area of a rectangle and circle?

Category: science space and astronomy
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The formula to find the area of a rectangle is egin{align*}A = lwend{align*}. The formula to find the area of a circle is egin{align*}A= pi r^2end{align*}. To find the area of a composite shape, simply find the area of each individual shape and add them together.

Accordingly, how do you find the area of shapes?

To find the area of a square or rectangle, just multiply the width of the shape by its height. To find the area of a circle, start by measuring the distance between the middle of the circle to the edge, which will give you the radius. Then, square the radius and multiply it by pi to find the area.

Also, how do you find the maximum area of a rectangle inscribed in a circle? Since x must be positive, then x = r/√2. Thus, x = r/√2 and y = r/√2. Solving for the width and height and noting 2r is equal to the diameter d we have: The width and height have the same length; therefore, the rectangle with the largest area that can be inscribed in a circle is a square.

Keeping this in consideration, what is the formula for area of a sector of a circle?

The area of a sector of a circle is ½ r² ∅, where r is the radius and ∅ the angle in radians subtended by the arc at the centre of the circle. So in the below diagram, the shaded area is equal to ½ r² ∅ .

What is the area of an irregular shape?

There are times when you need to find the area of a shape that is not a regular shape. One method for finding the area of an irregular shape is to divide the shape into smaller shapes which you do have the formula for. Then you find the area of all of the smaller shapes and add all of your areas together.

### What is the area of this trapezoid?

Explanation: To find the area of a trapezoid, multiply the sum of the bases (the parallel sides) by the height (the perpendicular distance between the bases), and then divide by 2.

### How do you find the area calculator?

Calculate the Area as Square Footage
1. If you are measuring a square or rectangle area, multiply length times width; Length x Width = Area.
2. For other area shapes, see formulas below to calculate Area (ft2) = Square Footage.

### What is the formula for circumference?

The circumference = π x the diameter of the circle (Pi multiplied by the diameter of the circle). Simply divide the circumference by π and you will have the length of the diameter. The diameter is just the radius times two, so divide the diameter by two and you will have the radius of the circle!

### What is arc of a circle?

Arc Of A Circle. The arc of a circle is a portion of the circumference of a circle. The formula for finding arc length in radians is where r is the radius of the circle and θ is the measure of the central angle in radians.

### How do I find the length of an arc?

To find arc length, start by dividing the arc's central angle in degrees by 360. Then, multiply that number by the radius of the circle. Finally, multiply that number by 2 × pi to find the arc length.

### Can a rectangle fit in a circle?

Benneth, Actually - every rectangle can be inscribed in a (unique circle) so the key point is that the radius of the circle is R (I think). One of the properties of a rectangle is that the diagonals bisect in the 'center' of the rectangle, which will also be the center of the circumscribing circle.

### What is a circle inside a triangle called?

In geometry, the incircle or inscribed circle of a triangle is the largest circle contained in the triangle; it touches (is tangent to) the three sides. The center of the incircle is a triangle center called the triangle's incenter.

### How do you find the largest area of a rectangle?

A rectangle will have the maximum possible area for a given perimeter when all the sides are the same length. Since every rectangle has four sides, if you know the perimeter, divide it by four to find the length of each side. Then find the area by multiplying the length times the width.

### What is the area of the largest rectangle that can be inscribed in the ellipse?

Thus the maximum area of a rectangle that can be inscribed in an ellipse is 2ab sq. units. Here a = 1,b=1/2. Thus area = 2.1.

### Can a parallelogram be inscribed in a circle?

For a quadrilateral to be inscribed in a circle, its opposite angles must be supplementary. For a quadrilateral to be a parallelogram, it's opposite angles must be equal. Therefore, for a parallelogram to be inscribed in a circle, it must have four right angles, i.e. be a rectangle.

### How many circles can fit in a rectangle?

If we make 257 the vertical dimension, then the rectangle is a bit over 144⋅r units tall, and a bit over (2+49√3)⋅r units wide. So we can arrange the circles in 50 columns that alternate between 72 and 71 circles, for 25⋅72+25⋅71=3575 circles.