A Quadrilateral Calculator is a tool used to calculate various properties of a quadrilateral, which is a four-sided polygon. Some of the most common properties that can be calculated using a quadrilateral calculator include:

**Enter Information**

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The Quadratic Formula is:

x = (-b ± sqrt(b^2 - 4ac)) / (2a)

This formula gives the two solutions for the quadratic equation, which are also known as the roots of the equation.

If the discriminant (b^2 - 4ac) is positive, the quadratic equation has two real roots.

If the discriminant is zero, the quadratic equation has one real root (known as a double root).

If the discriminant is negative, the quadratic equation has no real roots (but two complex roots).

The Quadratic Formula can be derived by completing the square of the quadratic equation. The process involves adding and subtracting a term (b^2 / 4a^2) inside the parentheses so that the quadratic expression inside the square root can be simplified into a perfect square. The resulting expression is then solved for "x" using basic algebraic operations.

## What is a quadrilateral?

Quadrilateral calculator is an online tool that helps in calculating the perimeter, area, diagonals, angles, and other properties of a quadrilateral. A quadrilateral is a four-sided polygon, and there are different types of quadrilaterals such as squares, rectangles, parallelograms, rhombuses, and trapezoids. The calculator takes the input of different measurements of a quadrilateral, such as sides and angles, and performs the necessary calculations to provide the required outputs.

## How to use quadrilateral calculator?

To use a quadrilateral calculator, you need to follow these steps:

- Go to a quadrilateral calculator website or app.
- Enter the known measurements of the quadrilateral, such as the Side A, B, C.
- Click on the “calculate” button to get the results.
- The calculator will display the calculated values, all sides.

Make sure to enter the measurements in the correct unit of measurement, such as inches or centimeters, and to double-check the input values before clicking on the calculate button.

## What are different types of quadrilateral?

There are several types of quadrilaterals, each with its own unique set of properties. The five main types of quadrilaterals are:

- Square: A square is a four-sided polygon with equal sides and four right angles.
- Rectangle: A rectangle is a four-sided polygon with two pairs of equal sides and four right angles.
- Parallelogram: A parallelogram is a four-sided polygon with two pairs of parallel sides.
- Rhombus: A rhombus is a four-sided polygon with equal sides and opposite angles that are equal.
- Trapezoid: A trapezoid is a four-sided polygon with one pair of parallel sides and one pair of non-parallel sides.

Other types of quadrilaterals include kite, cyclic quadrilateral, tangential quadrilateral, and concave quadrilateral. Each type of quadrilateral has its own set of properties and formulas for calculating their area, perimeter, diagonals, and angles.

## How to find the area of a quadrilateral and examples?

The formula for calculating the area of a quadrilateral depends on the type of quadrilateral. Here are the formulas for the five main types of quadrilaterals:

- Square: To find the area of a square, you can use the formula A = s^2, where s is the length of one side of the square.
- Rectangle: To find the area of a rectangle, you can use the formula A = lw, where l is the length of the rectangle and w is the width.
- Parallelogram: To find the area of a parallelogram, you can use the formula A = bh, where b is the base of the parallelogram and h is the height.
- Rhombus: To find the area of a rhombus, you can use the formula A = (d1 x d2)/2, where d1 and d2 are the lengths of the diagonals.
- Trapezoid: To find the area of a trapezoid, you can use the formula A = (b1 + b2)h/2, where b1 and b2 are the lengths of the parallel sides and h is the height of the trapezoid.

To use these formulas, simply plug in the values for the corresponding variables and solve for the area.

here are some examples of how to find the area of a quadrilateral:

- Find the area of a square with a side length of 6 cm.

Solution: The formula to find the area of a square is A = s^2, where s is the length of a side. Substituting s = 6 cm, we get:

A = 6^2 = 36 cm^2

Therefore, the area of the square is 36 square centimeters.

- Find the area of a rectangle with a length of 8 meters and a width of 5 meters.

Solution: The formula to find the area of a rectangle is A = l x w, where l is the length and w is the width. Substituting l = 8 meters and w = 5 meters, we get:

A = 8 x 5 = 40 meters^2

Therefore, the area of the rectangle is 40 square meters.

- Find the area of a trapezoid with a height of 10 centimeters, a base of 6 centimeters, and a top side of 4 centimeters.

Solution: The formula to find the area of a trapezoid is A = ((b1 + b2)/2) x h, where b1 and b2 are the lengths of the two parallel sides and h is the height. Substituting b1 = 6 cm, b2 = 4 cm, and h = 10 cm, we get:

A = ((6 + 4)/2) x 10 = 50 cm^2

Therefore, the area of the trapezoid is 50 square centimeters.