An Introduction to Quadrilaterals

Geometry starts with a point, then move forward by putting billions and billions of points side by side to make a line or line segment.

Then two lines intersect each other to make an angles. We can use three line segments to make a closed shape which is known as a triangle and triangle is the most basic polygon.

After learning about triangles we can start to consider about 4 line segments. What do we get if we use 4 line segments to make a polygon or to make a closed shape?

The shape we get, is known as a quadrilateral. A quadrilateral is a four sided shape with four vertices and four angles. 

There are many types of quadrilaterals and we will learn about them one by one but for today's lesson just know about quadrilaterals!

Below are the links to 2nd grade and 3rd grade math pages, where you can print all the content for 2nd and 3rd grade math students;

2ND GRADE MATH CORE CURRICULUM

3RD GRADE MATH CORE CURRICULUM