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# How many of them are quadrilateral?

## How many of them are quadrilateral?

A quadrilateral is a polygon with four sides. There are seven quadrilaterals, some that are surely familiar to you, and some that may not be so familiar. Check out the following definitions and the quadrilateral family tree in the following figure.

The properties of different types of quadrilaterals

• A rectangle is a parallelogram.
• A square is a parallelogram.
• A rhombus is a parallelogram.
• A kite is a parallelogram.
• A trapezium is a parallelogram.
• A square is a rhombus.
• A square is a rectangle.
• A square is a kite.

The sum of the interior angles of any quadrilateral is 360°. Consider the two examples below. You could draw many quadrilaterals such as these and carefully measure the four angles. You would find that for every quadrilateral, the sum of the interior angles will always be 360°.

### What is the rule of quadrilateral?

All sides are equal and, opposite sides are parallel to each other. Diagonals bisect each other perpendicularly. Sum of any two adjacent angles is 180°

Can two triangles be placed in a quadrilateral?

Any quadrilateral can be divided into two triangles as shown in the images below. Since the sum of the interior angles of any triangle is 180° and there are two triangles in a quadrilateral, the sum of the angles for each quadrilateral is 360°.

What is the formula for a quadrilateral?

The formula for an irregular quadrilateral — which is a polygon that has four sides that are of unequal length — is the same as that of a trapezoid. The formula is a + b + c+ d = perimeter. For example, suppose that a quadrilateral has sides with lengths of 1, 5, 3 and 4 inches.

## What are the names of all quadrilaterals?

Quadrilaterals are polygons with four sides. They are classified according to measures of equal angles and equal sides. There are seven different types of quadrilaterals: parallelogram, rhombus, rectangle, square, kite, trapezoid, and isosceles trapezoid.