Looking for free content to use with your textbook? You’ve come to the right place!
Get Free Content to Use with Into Math – Geometry
Khan Academy is a nonprofit with thousands of free videos, articles, and practice questions for just about every skill.
No ads, no subscriptions – just 100% free, forever.
Lesson 1.1: Points, Lines, and Planes |
Lesson 1.2: Define and Measure Angles |
Lesson 1.3: Polygons and Other Figures in the Plane |
Lesson 1.4: Apply the Distance Formula |
Lesson 2.1: Write Conditional Statements |
Lesson 2.2: Use Inductive and Deductive Reasoning |
Lesson 2.3: Write Proofs about Segments |
Lesson 2.4: Write Proofs about Angles |
Lesson 3.1: Parallel Lines Crossed by a Transversal |
Lesson 3.2: Prove Lines are Parallel |
Lesson 3.3: Prove Lines are Perpendicular |
Lesson 4.1: Slope and Equations of Parallel Lines |
Lesson 4.2: Slope and Equations of Perpendicular Lines |
Lesson 4.3: Write a Coordinate Proof |
Lesson 5.1: Define and Apply Translations |
Lesson 5.2: Define and Apply Rotations |
Lesson 5.3: Define and Apply Reflections |
Lesson 5.4: Define and Apply Symmetry |
Lesson 6.1: Define and Apply Dilations, Stretches, and Compressions |
Lesson 6.2: Apply Sequences of Transformations |
Lesson 7.1: Understand Congruent Figures |
Lesson 7.2: Corresponding Parts of Congruent Figures |
Lesson 7.3: Use Rigid Motions to Prove Figures are Congruent |
Lesson 8.1: Develop ASA Triangle Congruence |
Lesson 8.2: Develop SAS Triangle Congruence |
Lesson 8.3: Develop SSS Triangle Congruence |
Lesson 8.4: Develop AAS and HL Triangle Congruence |
Lesson 9.1: Angle Relationships in Triangles |
Lesson 9.2: Perpendicular Bisectors in Triangles |
Lesson 9.3: Angle Bisectors in Triangles |
Lesson 9.4: Medians and Altitudes in Triangles |
Lesson 9.5: The Triangle Midsegment Theorem |
Lesson 10.1: Inequalities Within a Triangle |
Lesson 10.2: Inequalities Between Two Triangles |
Lesson 11.1: Properties of Parallelograms |
Lesson 11.2: Conditions for Parallelograms |
Lesson 11.3: Properties of Rectangles, Rhombuses, and Squares |
Lesson 11.4: Conditions for Rectangles, Rhombuses, and Squares |
Lesson 11.5: Properties and Conditions for Trapezoids and Kites |
Lesson 12.1: Use Transformations to Prove Figures Are Similar |
Lesson 12.2: Develop AA Triangle Similarity |
Lesson 12.3: Develop and Prove Triangle Proportionality |
Lesson 12.4: Apply Similarity in Right Triangles |
Lesson 13.1: Tangent Ratio |
Lesson 13.2: Sine and Cosine Ratios |
Lesson 13.3: Special Right Triangles |
Lesson 13.4: Solve Problems Using Trigonometry |
Lesson 14.1: Law of Sines |
Lesson 14.2: Law of Cosines |
Lesson 15.1: Central Angles and Inscribed Angles |
Lesson 15.2: Angles in Inscribed Quadrilaterals |
Lesson 15.3: Tangents and Circumscribed Angles |
Lesson 15.4: Circles on the Coordinate Plane |
Lesson 16.1: Segment Relationships in Circles |
Lesson 16.2: Angle Relationships in Circles |
Lesson 17.1: Measure Circumference and Area of a Circle |
Lesson 17.2: Measure Arc Length and Use Radians |
Lesson 17.3: Measure Sector Area |
Lesson 18.1: Three-Dimensional Figures |
Lesson 18.2: Surface Areas of Prisms and Cylinders |
Lesson 18.3: Surface Areas of Pyramids and Cones |
Lesson 18.4: Surface Areas of Spheres |
Lesson 19.1: Volumes of Prisms and Cylinders |
Lesson 19.2: Volumes of Pyramids and Cones |
Lesson 19.3: Volumes of Spheres |
Lesson 20.1: Probability and Set Theory |
Lesson 20.2: Disjoint and Overlapping Events |
Lesson 21.1: Conditional Probability |
Lesson 21.2: Independent Events |
Lesson 21.3: Dependent Events |