Thinkwell - Geometry

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Thinkwell’s Geometry gives your student everything they need to master high school Geometry. With engaging video lessons from award-winning professor and mathematician Edward Burger, Geometry comes to life through clear explanations, real-world connections, step-by-step proofs, and problem-solving.

Students can practice what they learn with automatically graded exercises that provide instant feedback, helping them build both skill and confidence. Every course also includes a free digital companion e-book for extra support. (Preview the e-book)

⭐ New! Studdy Buddy — your student’s built-in math tutor. Get instant, step-by-step help on practice problems anytime, included free with every Geometry course. Learn more about StuddyBuddy in the Samples, Videos, & Resource Links tab.

Whether your student is seeing Geometry for the first time or reviewing for higher-level math, Thinkwell’s Geometry makes mastering shapes, proofs, and spatial reasoning easy and engaging.

Looking for more challenge? Explore our Honors Geometry course for advanced learners.

Thinkwell's 36-Week Syllabus for Online Geometry

1: Algebra Review – Part I

• AR.1 Solving Equations and Inequalities
• AR.1.1 Simplifying Expressions
• AR.1.2 Writing and Solving Two-Step Equations
• AR.1.3 Solving Two-Step Inequalities
• AR.1.4 Writing and Solving Multi-Step Equations
• AR.1.5 Solving Equations with Variables on Both Sides
• AR.1.6 Systems of Equations
• AR.2 Graphing and the Coordinate Plane
• AR.2.1 The Coordinate Plane
• AR.2.2 Equations, Tables, and Graphs
• AR.2.3 Graphing Using Intercepts
• AR.3 Ratio and Proportion
• AR.3.1 Rates, Ratios, and Proportions
• AR.3.2 Applications of Proportions
• AR.3.3 Finding and Using Percents
2: Algebra Review – Part II

• AR.4 Operations with Polynomials and Factoring
• AR.4.1 Adding and Subtracting Polynomials
• AR.4.2 Multiplying and Dividing Monomials
• AR.4.3 Multiplying Monomials by Polynomials
• AR.4.4 Multiplying Binomials
• AR.4.5 Factoring with the GCF
• AR.4.6 Factoring x2 + bx + c
• AR.4.7 Factoring ax2 + bx + c
• AR.5 Radicals and Solving Quadratics
• AR.5.1 Radical Expressions
• AR.5.2 Solving Quadratic Equations by Factoring
• AR.5.3 Solving Quadratic Equations by Using Square Roots
3: Points, Lines, Planes, and Angles

• 1.1 Points, Lines, Planes, and Angles
• 1.1.1 Understanding Points, Lines, and Planes
• 1.1.2 Measuring and Constructing Segments
• 1.1.3 Measuring and Constructing Angles
4: Points, Lines, Planes, and Angles (continued)

• 1.1 Points, Lines, Planes, and Angles
• 1.1.4 Pairs of Angles
• Quiz – 1.1
5: Coordinate and Transformation Tools

• 1.2 Coordinate and Transformation Tools
• 1.2.1 Using Formulas in Geometry
• 1.2.2 Midpoint and Distance in the Coordinate Plane
• 1.2.3 Transformations in the Coordinate Plane
• Quiz – 1.2
6: Assessment

• Practice Test – 1.1 & 1.2
• Test – 1.1 & 1.2
7: Inductive and Deductive Reasoning

• 2.1 Inductive and Deductive Reasoning
• 2.1.1 Using Inductive Reasoning to Make Conjectures
• 2.1.2 Conditional Statements
• 2.1.3 Using Deductive Reasoning to Verify Conjectures
• 2.1.4 Biconditional Statements and Definitions
• Quiz – 2.1
8: Mathematical Proof

• 2.2 Mathematical Proof
• 2.2.1 Algebraic Proof
• 2.2.2 Geometric Proof
• 2.2.3 Flowchart and Paragraph Proofs
• Quiz – 2.2
9: Assessment

• Practice Test – 2.1 & 2.2
• Test – 2.1 & 2.2
10: Lines with Transversals

• 3.1 Lines with Transversals
• 3.1.1 Planes, Lines, and Angles
• 3.1.2 Angles, Parallel Lines, and Transversals
• 3.1.3 Proving that Lines are Parallel
• 3.1.4 Properties of Perpendicular Lines
• Quiz – 3.1
11: Slope and the Equation of a Line

• 3.2 Slope and the Equation of a Line
• 3.2.1 Finding the Slope Given Two Points
• 3.2.2 Slope-Intercept Form
• 3.2.3 Point-Slope Form
12: Slope and the Equation of a Line (continued)

• 3.2 Slope and the Equation of a Line
• 3.2.4 Slopes of Parallel and Perpendicular Lines
• Quiz – 3.2
13: Assessment

• Practice Test – 3.1 & 3.2
• Test – 3.1 & 3.2
14: Triangles and Congruence

• 4.1 Triangles and Congruence
• 4.1.1 Classifying Triangles
• 4.1.2 Angle Relationships in Triangles
• 4.1.3 Congruent Triangles
• Quiz – 4.1
15: Proving Triangle Congruence

• 4.2 Proving Triangle Congruence
• 4.2.1 Triangle Congruence: SSS and SAS
• 4.2.2 Triangle Congruence: ASA, AAS, and HL
• 4.2.3 Triangle Congruence: CPCTC
16: Proving Triangle Congruence (continued)

• 4.2 Proving Triangle Congruence
• 4.2.4 Introduction to Coordinate Proof
• 4.2.5 Isosceles and Equilateral Triangles
• Quiz – 4.2
17: Assessment

• Practice Test – 4.1 & 4.2
• Test – 4.1 & 4.2
18: Midterm Assessment

• Practice Midterm Exam
• Midterm Exam
19: Segments in Triangles

• 5.1 Segments in Triangles
• 5.1.1 Perpendicular and Angle Bisector Theorems
• 5.1.2 Medians, Altitudes, and Midsegments in Triangles
• 5.1 Review Worksheet
• Quiz – 5.1
20: Relationships in Triangles

• 5.2 Relationships in Triangles
• 5.2.1 Indirect Proof and Inequalities in One Triangle
• 5.2.2 Inequalities in Two Triangles
21: Relationships in Triangles (Continued)

• 5.2 Relationships in Triangles (continued)
• 5.2.3 The Pythagorean Theorem
• 5.2.4 Applying Special Right Triangles
• 5.2 Review Worksheet
• Quiz – 5.2
22: Assessment

• Practice Test – 5.1 & 5.2
• Test – 5.1 & 5.2
23: Polygons and Parallelograms

• 6.1 Polygons and Parallelograms
• 6.1.1 Properties and Attributes of Polygons
• 6.1.2 Properties of Parallelograms
• 6.1.3 Conditions for Parallelograms
• 6.1 Review Worksheet
• Quiz – 6.1
24: Other Special Quadrilaterals

• 6.2 Other Special Quadrilaterals
• 6.2.1 Properties of Special Parallelograms
• 6.2.2 Conditions for Special Parallelograms
• 6.2.3 Properties of Kites and Trapezoids
• 6.2 Review Worksheet
• Quiz – 6.2
25: Assessment

• Practice Test – 6.1 & 6.2
• Test – 6.1 & 6.2
26: Similarity Relationships

• 7.1 Similarity Relationships
• 7.1.1 Ratio and Proportion
• 7.1.2 Ratios in Similar Polygons
• 7.1.3 Triangle Similarity: AA, SSS, and SAS
• 7.1 Review Worksheet
• Quiz – 7.1
27: Trigonometric Ratios

• 8.1 Trigonometric Ratios
• 8.1.1 Similarity in Right Triangles
• 8.1.2 Trigonometric Ratios
• 8.1.3 Solving Right Triangles
• 8.1 Review Worksheet
• Quiz – 8.1
28: Assessment

• Practice Test – 7.1 & 8.1
• Test – 7.1 & 8.1
29: Developing Geometric Formulas

• 9.1 Developing Geometric Formulas
• 9.1.1 Developing Formulas for Triangles and Quadrilaterals
• 9.1.2 Developing Formulas for Circles and Regular Polygons
• 9.1 Review Worksheet
• Quiz – 9.1
30: Surface Area and Volume

• 10.1 Surface Area and Volume
• 10.1.1 Surface Area of Prisms and Cylinders
• 10.1.2 Surface Area of Pyramids and Cones
• 10.1.3 Volume of Prisms and Cylinders
• 10.1 Review Worksheet
• Quiz – 10.1
31: Assessment

• Practice Test – 9.1 & 10.1
• Test – 9.1 & 10.1
32: Lines and Arcs in Circles

• 11.1 Lines and Arcs in Circles
• 11.1.1 Lines That Intersect Circles
• 11.1.2 Arcs and Chords
• 11.1 Review Worksheet
• Quiz – 11.1
33: Angles and Segments in Circles

• 11.2 Angles and Segments in Circles
• 11.2.1 Inscribed Angles
• 11.2.2 Angle Relationships in Circles
• 11.2.3 Segment Relationships in Circles
• 11.2 Review Worksheet
• Quiz – 11.2
34: Congruence Transformations

• 12.1 Congruence Transformations
• 12.1.1 Reflections
• 12.1.2 Translations
• 12.1.3 Rotations
• 12.1 Review Worksheet
• Quiz – 12.1
35: Assessment

• Practice Test – 11.1, 11.2 & 12.1
• Test – 11.1, 11.2 & 12.1
36: Final Assessment

• Practice Final Exam
• Final Exam

This Course Includes:

• 20+ hours of video instruction
• Auto-graded exams, quizzes & exercises
• FREE e-book with notes, worksheets & exercises
• 12 months unlimited access
• Daily lesson plan (approx. 30-40 mins/day)
• Certificate of completion & grade report
• NEW! Studdy Buddy – step-by-step help anytime you need it

Course Features

• Video Lessons: 244 Engaging 5–7 minute Geometry lesson videos
• Lesson Plan: Detailed, 36-week lesson plan and schedule
• Assessments: Automatically graded quizzes and tests
• Notes & Worksheets: Easily printable notes, worksheets & exercises

Publisher's Information
Publisher: Thinkwell Corporation
Age Recommendation: 14+
Grade Recommendation: 10th+
Faith-Based: No
Consumable: Yes
Subscription Info: 1 year subscription
System Requirements: Device with internet access
Format: Online course

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