Khan Academy
Khan Academy: Equal Parts of Circles and Rectangles
Looks at circles and rectangles that are divided into sections and discusses how to tell if they are in equal parts of halves or fourths. [3:04]
Khan Academy
Khan Academy: Equal Parts of Circles and Rectangles
Sal determines if shapes are divided into 2 or 4 equal sections.
Khan Academy
Khan Academy: Slicing a Rectangular Pyramid
Demonstrates what types of shapes one can get in a cross-section when a rectangular pyramid is sliced. [3:29]
Khan Academy
Khan Academy: Cylinder Volume and Surface Area
Looks at how to find the volume and the surface area of a cylinder using the standard geometric formulas. [8:07]
Khan Academy
Khan Academy: Volume of a Cone
A video exploring how to calculate the volume of a cone. [5:43]
Khan Academy
Khan Academy: Performing Reflections: Quadrilateral
Demonstrates how to use an interactive tool to find the reflection of a quadrilateral on a Cartesian grid. Includes a discussion of slope. [2:26]
Khan Academy
Khan Academy: Triangles: Intro to Triangle Similarity
Explains what it means for two triangles to be similar. Diagram of similar triangles is created with two parallel lines cut by two transversals.
Khan Academy
Khan Academy: Parallel & Perpendicular Lines Intro
Learn the properties of parallel and perpendicular lines so that you can easily identify them. [2:08]
Khan Academy
Khan Academy: Halves and Fourths
Demonstrates what equal parts look like when dividing shapes into halves and quarters. [2:25]
Khan Academy
Khan Academy: Decomposing Shapes to Find Area: Subtract
Demonstrates how to find the area of a rectangular shape enclosed by another rectangle and with a third one inside it. [3:12]
Khan Academy
Khan Academy: Decomposing Shapes to Find Area: Add
Demonstrates how to break an irregular shape into three rectangles, find the individual areas, and then add them together. [3:36]
Khan Academy
Khan Academy: Angles, Parallel Lines, & Transversals
Looks at parallel lines and intersecting lines (transversals), and the angles they form. [7:08]
Khan Academy
Khan Academy: Recognizing Shapes
Discusses how to identify basic 2D shapes by their properties. [6:08]
Khan Academy
Khan Academy: Cousin Fal's Shape Collection
Looks at a collection of 2D shapes and discusses how to identify them based on their properties. [4:19]
Khan Academy
Khan Academy: Intro to Nets of Polyhedra
Learn about the nets that represent 3D solids. [6:48]
Khan Academy
Khan Academy: Recognizing Shapes
Learn the names of different shapes and how to recognize them. [6:08]
Khan Academy
Khan Academy: Find Measure of Angles Word Problem
Presents a problem where pie slices are measured in degrees and you must find the angle of your piece. [4:33]
Khan Academy
Khan Academy: Find Measure of Vertical Angles
Demonstrates how to find unknown angles for two intersecting lines when some angle information is given. [3:00]
Khan Academy
Khan Academy: Triangle Inequality Theorem
Explains the Triangle Inequality Theorem, which states that the sum of two sides of a triangle is always more than the length of the third side. [5:52]
Khan Academy
Khan Academy: Area of Composite Shapes
Models how to break an irregular polygon into smaller composite shapes, calculate the area for each of those, then add all the amounts together to get the total area. [5:15]
Khan Academy
Khan Academy: Area of Triangles Intuition
Learn the formula for the area of a triangle, one half base times height. [5:29]
Khan Academy
Khan Academy: Coordinate Plane Graphing Word Problem
Understand how to solve a word problem involving distance between points on quadrant 1 of a coordinate plane. [2:05]
Khan Academy
Khan Academy: Coordinate Plane: Graphing Points
Video tutorial demonstrates how to graph ordered pairs on a coordinate plane. [2:20]
Khan Academy
Khan Academy: Coordinates of a Missing Vertex
Shows how to locate a missing vertex of a rectangle when you know the coordinates of the other three vertices. [2:40]
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