This quadrilateral isn't convex, but it still looks like EFGH is a parallelogram. That's true, too. In fact, the four points making the quadrilateral don't even have ...

A quadrilateral is a four-sided shape, where the sides are straight and meet at four vertices. The prefix “quad” means four. There are several types of quadrilaterals. Can you name them?

A parallelogram close parallelogramA quadrilateral with opposite pairs of sides that are both equal in length and parallel. Opposite angles are equal. can be cut and rearranged to form a rectangle ...

→ Types of Quadrilaterals → Properties of a Parallelogram → Condition for a Quadrilateral to be a Parallelogram → The Mid-point Theorem A screenshot of the NCERT Class 9 Maths Chapter 8 is ...

This study provides a description of the van Hiele levels of reasoning in geometry according to responses to clinical interview tasks concerning triangles and quadrilaterals. The subjects were 13 ...