Euclid of Alexandria was a Greek mathematician who is often referred to as the “father of geometry.” He was born around 300 BCE, which is over 2300 years ago!

Watch this video to learn how triangles, rectangles, and other planar figures are extremely useful tools, present in many objects all around us.

Why Should You Learn About Planar Figures?

Lines, Line Segments and Rays

Edges, Vertices and Angles

Acute, Obtuse and Right Angles

Polygons

Composite Figures

Mirror Symmetry

Rotational Symmetry

Geometric Translation

Perimeter

Area

What Are Planar Figures?

Introduction

Mathagon

Learn how to use the drawing tool GeoGebra. GeoGebra can help you with all sorts of calculations and visualizations, and save you a lot of work.