This free online course teaches you how to measure angles, prove geometric theorems, and discover how to calculate areas and volumes. It can be helpful to both refresh your geometry knowledge and to familiarise yourself with the terminology in English.

Throughout the course, you can expect to find the answers to questions like "How big is an angle?" and "What are parallel lines?" and move on to advanced theorems and proofs about 2D and 3D shapes. Moreover, you'll learn a few different ways to determine the area of a triangle, you'll discover a shortcut for counting the number of stones in the Great Pyramid of Giza, and you'll even come up with your own estimate for the size of the Earth.

**The course will teach you:**

How to measure angles, and rules for determining when angles are congruent

How to prove and apply properties of triangles, quadrilaterals, and other polygons

How to calculate the areas of polygons, circles, ellipses, and other complex shapes

How to prove and apply the Pythagorean theorem

How line segments and angles in circles are related

How to calculate the volumes and surface areas of three-dimensional solids

**Requirements: **Basic algebra (solving an equation for an unknown value)

**Starting date: **Self-paced

**Length: **14 weeks

**Institution: **School Yourself

**Language: **English

**Professor: **Zach Wissner-Gross and others

**Platform: **edX