Instructional Video
Sophia Learning

Sophia: Language of Geometry

For Students 9th - 10th Standards
This video lesson defines and provides an example of common geometry terms including theorem, postulate, axiom, and corollary.
Instructional Video
Khan Academy

Khan Academy: Terms & Labels in Geometry

For Students 3rd - 4th Standards
Learn about geometry terms like point, line, and ray. We will also learn how to label them.
Instructional Video
Math Planet

Math Planet: Geometry: Triangles

For Students 9th - 10th Standards
Discussion of triangles through the use of examples and a video lesson. [1:08]
Instructional Video
Khan Academy

Khan Academy: Triple Bonds Cause Linear Configurations

For Students 9th - 10th
Understand the linear geometry of a triple bond. [1:11]
Instructional Video
Khan Academy

Khan Academy: Ca Geometry: Pythagorean Theorem, Compass Constructions

For Students 9th - 10th
51-55, Pythagorean Theorem, compass constructions.
Instructional Video
Khan Academy

Khan Academy: Ca Geometry: Pythagorean Theorem, Area

For Students 6th - 8th Standards
36-40, Pythagorean Theorem and area.
Instructional Video
Khan Academy

Khan Academy: Ca Geometry: Area, Pythagorean Theorem

For Students 6th - 8th Standards
26-30, area, circumference, pythagorean theorem.
Instructional Video
Khan Academy

Khan Academy: Ca Geometry: Triangles and Parallelograms

For Students 9th - 10th Standards
Worked examples of triangles and parallelograms.
Instructional Video
Khan Academy

Khan Academy: Ca Geometry: Similar Triangles 1

For Students 9th - 10th Standards
worked examples of similar triangles.
Instructional Video
Khan Academy

Khan Academy: Ca Geometry: Circle Area Chords Tangent

For Students 9th - 10th
Worked examples of area, chords, and tangents of circles.
Instructional Video
Khan Academy

Khan Academy: Ca Geometry: Basic Trigonometry

For Students 9th - 10th
Worked examples of basic trigonometry.
Instructional Video
Khan Academy

Khan Academy: Ca Geometry: Proof by Contradiction

For Students 9th - 10th Standards
Examples of proof by contradiction.
Instructional Video
Khan Academy

Khan Academy: Ca Geometry: More Trig

For Students 9th - 10th
Worked trigonometry examples.
Instructional Video
Khan Academy

Khan Academy: Ca Geometry: More on Congruent and Similar Triangles

For Students 9th - 10th Standards
Worked examples of similar and congruent triangles.
Instructional Video
Khan Academy

Khan Academy: Ca Geometry: Exterior Angles

For Students 9th - 10th
Examples of polygon exterior angles.
Instructional Video
Khan Academy

Khan Academy: Ca Geometry: Deductive Reasoning

For Students 9th - 10th
Worked examples of deductive reasoning and congruent angles.
Instructional Video
Khan Academy

Khan Academy: Ca Geometry: Compass Construction

For Students 9th - 10th
Worked examples of compass construction and coordinates.
Instructional Video
Khan Academy

Khan Academy: Missing Angles (Ca Geometry)

For Students 9th - 10th
Worked examples deducing the measure of angles.
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry of Rectangles

For Students 9th - 10th Standards
This detailed lesson uses slope, midpoint, and distance formulas to prove a quadrilateral is a rectangle in the coordinate plane.
Instructional Video
Sophia Learning

Sophia: Vsepr: Basic Geometry

For Students 9th - 10th
A narrated lesson introducing the five basic shapes of simple molecules. [2:47]
Instructional Video
Khan Academy

Khan Academy: Geometry: Parts of a Circle

For Students 6th - 9th Standards
Identifies and labels basic parts of a circle: center, diameter, radius, and circumference. This video also appears in the Geometry: Circles strand. [2:01]
Instructional Video
Khan Academy

Khan Academy: Geometry: Triangle Angle Example 2

For Students 9th - 10th Standards
Shows how to find the measure of missing angles using the triangle sum theorem and vertical angles. This video also appears in the Geometry: Triangles strand. [4:55]
Instructional Video
Khan Academy

Khan Academy: Geometry: Triangle Angle Example 1

For Students 9th - 10th Standards
Explains how to use the triangle sum theorem to solve for missing angle measures in a triangle. Also addresses the relationship between the measure of an exterior angle of a triangle and the measures of the remote interior angles. This...
Instructional Video
Khan Academy

Khan Academy: Worked Examples: Geometry: Ca Geometry: Similar Triangles 1

For Students 9th - 10th
In this video tutorial students explore a proof using similar triangles.

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