Instructional Video
Massachusetts Institute of Technology

Mit: Blossoms: The Pythagorean Theorem: Geometry's Most Elegant Theorem

For Teachers 9th - 10th
Use this video to help teach the Pythagorean Theorem. The video can be downloaded, there is a transcript of the video, and a teacher's guide to aid in using the video. [21:38]
Instructional Video
Khan Academy

Khan Academy: Geometry: Similar Triangles

For Students 9th - 10th Standards
Explains how to determine unknown side lengths of similar triangles by identifying corresponding sides and angles ans setting up proportions. The first example is a continuation from the video "Similar Triangles." Practice problems...
Instructional Video
Khan Academy

Khan Academy: Geometry: Identifying Rays

For Students 9th - 10th
How to identify and name rays. [5:40]
Instructional Video
Khan Academy

Khan Academy: Geometry: Measuring Angles in Degrees

For Students 4th - 8th Standards
Explains how to measure an angle in degrees using a protractor. Defines acute, right, and obtuse angles. Practice problems available. [8:22]
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry of Isosceles Trapezoids: Lesson 2

For Students 9th - 10th Standards
This lesson [8:14] will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is an isosceles trapezoid in a coordinate plane. It is 2 of 5 in the series titled...
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry of Isosceles Trapezoids: Lesson 5

For Students 9th - 10th
This lesson [3:38] will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is an isosceles trapezoid in a coordinate plane. It is 5 of 5 in the series titled...
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry of Isosceles Trapezoids: Lesson 1

For Students 9th - 10th
This lesson [7:37] will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is an isosceles trapezoid in a coordinate plane. It is 1 of 5 in the series titled...
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry of Parallelograms: Lesson 3

For Students 9th - 10th Standards
This lesson [7:43] will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a parallelogram in a coordinate plane. It is 3 of 6 in the series titled...
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry of Rectangles: Lesson 3

For Students 9th - 10th
This lesson [7:55] will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a rectangle in a coordinate plane. It is 3 of 5 in the series titled...
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry of Rhombii: Lesson 3

For Students 9th - 10th Standards
This lesson will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a rhombus in a coordinate plane. It is 3 of 4 in the series titled "Coordinate...
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry of Rhombii: Lesson 4

For Students 9th - 10th
This lesson [2:19] will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a rhombus in a coordinate plane. It is 4 of 4 in the series titled "Coordinate...
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry of Square: Lesson 2

For Students 10th - 12th Standards
This lesson [7:10] will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a square in a coordinate plane. It is 2 of 3 in the series titled "Coordinate...
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry of Square: Lesson 3

For Students 9th - 10th Standards
This lesson will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a square in a coordinate plane. It is 3 of 3 in the series titled "Coordinate Geometry...
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry of Squares: Lesson 1

For Students 9th - 10th Standards
This lesson [8:34] will demonstrate how to use slope, midpoint, and distance formulas to determine, from the coordinates of the vertices, if a quadrilateral is a square in a coordinate plane. It is 1 of 2 in the series titled "Coordinate...
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry of Square: Lesson 1

For Students 9th - 10th Standards
This lesson will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a square in a coordinate plane. It is 1 of 3 in the series titled "Coordinate Geometry...
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry of Trapezoids: Lesson 2

For Students 9th - 10th Standards
This lesson [7:20] will demonstrate how to use slope, midpoint, and distance formulas to determine, from the coordinates of the vertices, if a quadrilateral is a trapezoid in a coordinate plane. It is 2 of 4 in the series titled...
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry of Trapezoids: Lesson 4

For Students 9th - 10th Standards
This lesson [15:33] will demonstrate how to use slope, midpoint, and distance formulas to determine, from the coordinates of the vertices of a quadrilateral, if the shape is a trapezoid. It is 4 of 4 in the series titled "Coordinate...
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry of Trapezoids: Lesson 1

For Students 9th - 10th Standards
This lesson [5:14] will demonstrate how to use slope, midpoint, and distance formulas to determine, from the coordinates of the vertices, if a quadrilateral is a trapezoid in a coordinate plane. It is 1 of 4 in the series titled...
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry of Rectangles: Lesson 1

For Students 9th - 10th Standards
This lesson [8:39] will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a rectangle in a coordinate plane. It is 1 of 5 in the series titled...
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry of Rhombii: Lesson 1

For Students 9th - 10th Standards
This lesson [8:08] will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a rhombus in a coordinate plane. It is 1 of 4 in the series titled "Coordinate...
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry of Rhombii: Lesson 2

For Students 9th - 10th Standards
This lesson [8:20] will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a rhombus in a coordinate plane. It is 2 of 4 in the series titled "Coordinate...
Instructional Video
Sophia Learning

Sophia: Vsepr: Basic Geometry: Lesson 2

For Students 9th - 10th
This lesson will illustrate the five basic shapes of simple molecules. It is 2 of 2 in the series titled "VSEPR: Basic Geometry."
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry of Parallelograms: Lesson 6

For Students 9th - 10th
This lesson [7:55] will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a parallelogram in a coordinate plane. It is 6 of 6 in the series titled...
Instructional Video
Sophia Learning

Sophia: Coordinate Geometry Subsection of the Act Test

For Students 9th - 10th
At the end of this video tutorial, you will understand what kinds of questions to expect when taking the coordinate geometry subsection of the ACT test.

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