Khan Academy
Khan Academy: Geometry: Circumcenter of a Triangle
Explains using multiple proofs that a point on a perpendicular bisector is equidistant from the endpoints of the segment it bisects. Proofs use triangle congruency postulates. Lays the foundation for understanding the circumcenter of a...
Khan Academy
Khan Academy: Geometry: Area of a Regular Hexagon
This video [7:50] demonstrates how to determine the area a regular hexagon with side length of 2 sq. rt. 3 based on knowledge of 30-60-90 triangles and the area formula of a triangle.
Khan Academy
Khan Academy: Geometry: Inscribed and Central Angles
Proof that the measure of an inscribed angle is half the measure of a central angle when the angles intercept the same arc. [14:16]
Khan Academy
Khan Academy: Geometry: Congruent Triangle Example 2
Demonstrates how to use triangle congruency to prove that corresponding sides of congruent triangles are congruent and then identifies other congruent parts in the overlapping triangle diagram. The proof is written in the form of a...
Khan Academy
Khan Academy: Geometry: Medians Divide Into Smaller Triangles of Equal Area
This video tutorial [7:46] demonstrates that the three medians of a triangle divide it into six smaller triangles with equal areas.
Planet Nutshell
Planet Nutshell: Math Shorts: Pythagorean Theorem
Planet Nutshell Math Shorts provide animated videos that explain various math topics. On this site students learn about the pythagorean theorem.
Sophia Learning
Sophia: Linear Equations From Sets of Data
Given a set of data, determine the linear function then assess learning with a quiz.
Sophia Learning
Sophia: Positive, Negative, and Zero Rates of Change
Explore the rate of change of a linear equation and determine if the change is negative, positive, or zero.
Khan Academy
Khan Academy: Geometry: Solid Geometry Volume
Describes how to find the volume of triangular prisms and cubes by finding the area of the base and multiplying it by the height (or depth). Practice problems available. [3:56]
Khan Academy
Khan Academy: More Analytic Geometry: Algebra: Equation of a Line
This video demonstrates how to take two given points of a line and write an equation for that line.
Khan Academy
Khan Academy: More Analytic Geometry: Parallel Lines 2
The video tutorial investigates parallel lines.
Khan Academy
Khan Academy: Geometry: Identifying Complementary and Supplementary Angles
Shows how to identify complementary and supplementary angles in a diagram. [2:36]
Khan Academy
Khan Academy: Geometry: Acute, Obtuse, and Right Angles
Demonstrates how to find all acute, obtuse, and right angles in a given diagram. [6:35]
Khan Academy
Khan Academy: More Analytic Geometry: Parallel Lines
The video tutorial investigates parallel lines.
Khan Academy
Khan Academy: More Analytic Geometry: Perpendicular Lines 2
This video demonstrates how to find the equation of a line when given a point on the line and the equation of a line perpendicular to it.
Khan Academy
Khan Academy: Geometry: Finding Missing Angles
Shows how to find the measure of missing angles based on the measure of a straight angle. [1:41]
Khan Academy
Khan Academy: Geometry: Introduction to Angles (Old)
Defines an angle, complementary angles, supplementary angles, and relates reflex angle measures to degress in a circle. [9:55]
Khan Academy
Khan Academy: Geometry: Complementary and Supplementary Angles
Defines and gives examples of complementary angles, supplementary angles, and adjacent angles. Practice problems available. [8:31]
Khan Academy
Khan Academy: Geometry: Area, Pythagorean Theorem
This video shows an understanding of the sum of the interior angles of polygons, properties of parallelogram, lateral area of a cone, area of a kite, and circumference of a circle.
Khan Academy
Khan Academy: Geometry: Exterior Angles
Video demonstrates volumes of rectangular prisms, exterior angles, interior angle sum, and exterior angle sum.
Khan Academy
Khan Academy: Geometry: Angle Bisector Theorem Examples
Explains how to use the angle bisector theorem to solve for the sides of a triangle. [3:04]
Khan Academy
Khan Academy: Geometry: Angles (Part 2)
Describes complementary and supplementary angles. Explains how to use properties of complementary and supplementary angles to solve for missing angle measures. Introduces idea that vertical angles (opposite angles) are congruent. [9:05]
Khan Academy
Khan Academy: More Analytic Geometry: Perpendicular Line Slope
This video shows how to find the slope of a line perpendicular to another line.
Khan Academy
Khan Academy: More Analytic Geometry: Parallel Lines 3
This video demonstrates how to determine if lines are parallel given the equations.
Other popular searches
- Geometry Shapes
- Geometry Proofs
- Geometry Shapes and Pictures
- Coordinate Geometry
- Geometry Proofs Worksheets
- Geometry in Everyday Life
- Solid Geometry
- Plane Geometry
- Geometry Lines
- Practice Geometry
- Drawing 3d Geometry Shapes
- Geometry Lessons