In this article, we will learn about various types of curves and geometric shapes related to it – polygons, triangles, quadrilateral and circles.

We have already learnt about lines and line segments in our previous article on geometric shapes.

### Curves

- Curves are geometric shapes of 2 types – Open and closed
- A STRAIGHT LINE is also a CURVE.

### Polygons

Polygons have 3 parts

- Sides
- Vertices
- Diagonals

### Angles – Acute, Obtuse and Reflex

- Suppose there are two TORCH flashing light in two different directions.
- We can consider the two rays as a pair of INTERSECTING LINE.
- So what is an ANGLE?
- ANGLE is an amount of turn between two straight lines that have a common end point (or a vertex).
- Further we can divide the angle into
- Acute
- Obtuse
- Reflex

### Triangles and Quadrilaterals – Geometric Shapes

- Triangle and Quadrilateral are geometric figures that are both Polygon.
- Triangle – 3 sided polygon, also a polygon with least number of sides.
- Quadrilateral is a 4 sided polygon.

### Circles

Interesting Facts

- Diameter is also a Chord that passes through the centre.
- Can we say that circle is a polygon with uncountable or infinite number of straight lines having very small length? Think.

To learn more about geometric shapes, download Byju’s the Learning App.