Geometry Essential Review


Thinkwell's Geometry Essential Review with Professor Edward Burger

This brief online course reviews key concepts your student saw in any Geometry math course at home or in school. 

Taught by award-winning mathematician and professor Edward Burger with online videos, automatically graded exercises, worksheets, and step-by-step explanations, this short-form course prepares your student for success in Trigonometry and beyond.  If you've got downtime in between courses, maintain good learning habits and fight the "summer slide" loss of learning!


Course Features

Video Lessons

40+ engaging video lessons
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Automatically Graded Assessments
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Worksheets and Answer Keys
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Certificate of Completion

Certificate of Completion
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What Parents Are Saying...
"I love Thinkwell math! My son and I think Professor Burger is awesome. We tried a few different math programs but nothing compares to Thinkwell. The concepts are presented in a way that makes them so much easier to understand. I go through the lectures and problems with my son most of the time and I am finally learning Geometry (my nemesis in high school and college). Professor Burger uses humor which makes it even better. We will definitely continue to use Thinkwell. I am so grateful to have found it!"
– Tina C
"We are using Thinkwell's Geometry, and we love it. The lectures are fun and well organized. The notes for each lesson are easy to follow and provide all the info needed to complete the problems. My son is excelling with this program, and I find it very easy to jump in and help him when needed!”
– Virginia
"We didn't start homeschooling until last year, my daughter's freshman year. I used a different math program that had come highly recommended and it was like pulling teeth to get my daughter to do her work. She said it was too confusing. This year we started with Thinkwell's Geometry and my daughter loves it. She can't believe how much better it is to understand. Now her math is done every day without being promoted. No more tears, no more fighting. Thank you, Thinkwell!”
– Teresa R.
Course Overview

What You Get

  • 3-month, online subscription to our complete Geometry Essentials course
  • 40+ course lessons
  • Automatically graded drill-and-practice exercises with step-by-step answer feedback
  • Downloadable, printable course worksheets & answer keys
  • Automatically graded quizzes
  • Skills assessment test with personalized study path feedback
  • Animated interactivities....and more!

How It Works

  • Purchase Thinkwell's Geometry Essentials through our online store and activate your 3-month subscription when you're ready
  • Take a brief diagnostic that creates a fast-track plan for topics where your student might need work (maximum 40 topics)
  • Access your course anytime, anywhere, from any device
  • Your work is automatically tracked and updated in real-time
  • Grade reports and certificates of completion are available at request
  • Need more info? Download our How This Course Works guide
Learn From Award-Winning Professor and Mathematician, Dr. Edward Burger

It's like having a world-class college professor right by your side.

  • "Global Hero in Education" by Microsoft Corporation
  • "America's Best Math Teacher" by Reader's Digest
  • Robert Foster Cherry Award Winner for Great Teaching
Geometry Essential Skills Table of Contents
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Optional Essential Skill Review

Writing and Solving Two-Step Equations
The Coordinate Plane
Ratio and Proportion
Finding the Slope Given Two Points
Slope-Intercept Form
Point-Slope Form
Understanding Points, Lines, and Planes
Pairs of Angles
Using Formulas in Geometry
Midpoint and Distance in the Coordinate Plane
Transformations in the Coordinate Plane

Writing Proofs and Line Relationships

Algebraic Proof
Geometric Proof
Flowchart and Paragraph Proofs
Planes, Lines, and Angles
Angles, Parallel Lines, and Transversals
Proving that Lines are Parallel
Properties of Perpendicular Lines


Classifying Triangles
Angle Relationships in Triangles
Congruent Triangles
Triangle Congruence: SSS and SAS
Triangle Congruence: ASA, AAS, and HL
Triangle Congruence: CPCTC
Introduction to Coordinate Proof
Isosceles and Equilateral Triangles

Properties, Attributes, and Similarity of Triangles

Perpendicular and Angle Bisector Theorems
Medians, Altitudes, and Midsegments in Triangles
Indirect Proof and Inequalities in One Triangle
Inequalities in Two Triangles
The Pythagorean Theorem
Applying Special Right Triangles
Ratios in Similar Polygons
Triangle Similarity: AA, SSS, and SAS
Applying Properties of Similar Triangles

Measurement of 2-D and 3-D Figures

Developing Formulas for Triangles and Quadrilaterals
Developing Formulas for Circles and Regular Polygons
Composite Figures
Perimeter and Area in the Coordinate Plane
Formulas in Three Dimensions
Surface Area of Prisms and Cylinders
Surface Area of Pyramids and Cones
Volume of Prisms and Cylinders
Volume of Pyramids and Cones

Circles and Transformations

Lines That Intersect Circles
Arcs and Chords
Sector Area and Arc Length
Inscribed Angles
Angle Relationships in Circles
Segment Relationships in Circles
Circles in the Coordinate Plane

Final Review

Frequently Asked Questions

How do Thinkwell "Essentials" courses work?

This short course is designed to ensure your student masters the essential skills of Geometry. Your student completes an assessment that provides a fast-track plan for the topics they need to complete. Each topic has a 5-10 minute online video lesson with additional exercises and instant correct-answer feedback. With approximately 40 topics in all, the course is self-paced and individualized to each student. Alternatively, you can choose where to start and end or follow the standard table of contents.

When does my 3-month online subscription start?

It begins when you're ready. You can have instant access to your online subscription when you purchase online, or you can buy now and start later.

Does my student get school credit for Thinkwell's Geometry Essentials?

No, only schools are accredited, and Thinkwell is not a school, though many accredited schools use Thinkwell.

What if my student needs access to the course for more than three months?

We suggest you enroll in Thinkwell's Geometry, which is a 12-month subscription.

Can I share access with more than one student?

The courses are designed and licensed to accommodate one student per username and password; additional students need to purchase online access, which allows parents to keep track of each student's progress and grades.

How long does it take to complete Thinkwell's Geometry Essentials?

The pace of your course is up to you but should be less than 40 lesson days.

Can I see my grade?

Thinkwell's course software tracks everything your student does. When logged in, your student can click "My Grades" to see their progress.

Can I get a transcript?

You can contact to request a file with your student's grades.

What if I change my mind and want to do a different math course, can I change?

If you discover that you should be in a different course, contact within one week of purchase, and we will move you to the appropriate course.

Can I print the exercises?

Yes, but completing the exercises online provides immediate correct answer feedback and automatic scoring, so we recommend answering the exercises online.

Are exercises multiple choice?

Most of the exercises are multiple choice, and they are automatically graded with correct answer solutions.

Is there a guarantee?

Yes, we offer a full refund within 14 days of purchase, no questions asked.

How does my school review this course?

Should your school need to review a Thinkwell course for any reason, have the school contact and we can provide them access to a demo site.

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