In geometry, a quadrilateral is a polygon with four sides or edges. There are several polygons that share the characteristics of a quadrilateral. However, while at least six shapes can be considered quadrilaterals, only two have four right angles — rectangles and squares.

Is a three sided triangle a quadrilateral?

Explanation: All triangles have three sides and three angles, hence the root word “tri” which means “three”. All quadrilaterals have four sides and four angles, hence the root “quad” meaning “four”. So no, an equilateral triangle is not a quadrilateral.

### Which of the following is not a quadrilateral?

Why triangle is not a quadrilateral?

In Euclidean geometry, any three points, specifically non-collinear, form a unique triangle and separately, a unique plane (known as two-dimensional Euclidean space). On the other hand, in terms of Euclidean plane geometry, a polygon having four edges (or sides) together with four vertices is called a quadrilateral.

#### Which quadrilateral has no right angles?

rhombus
But it is mentioned that none of the angles of the quadrilateral is a right angle, so we can say that it is not a square. Therefore, we can conclude that a quadrilateral with four equal sides and no right angles can be called a rhombus.

Do all quadrilaterals have equal sides?

A regular quadrilateral has equal sides and angles and is called a square, while an irregular quadrilateral has sides and angles of different sizes. These include the rectangle, trapezoid, and rhombus.

## How do you make a quadrilateral?

Constructing quadrilaterals can be done through 4 ways. 1) When 4 sides and one diagonal are given. Construct the quadrilateral ABCD with AB = 4 cm, BC = 6 cm, CD = 5.5 cm, AD= 5 cm and AC = 8 cm. Step 2: With 4 cm as radius from A draw an arc. Step 3: With 6 cm as radius cut the arc drawn in step 2.

What is quadrilateral with 2 equal sides?

A parallelogram is a quadrilateral with two sets of parallel sides. Equal conditions are that opposite sides are of equal length; that opposite angles are equal; or that the diagonals bisect each other.