CK-12 Foundation
Calculating Area of a Circle: Lesson
It really is as easy as pi. The segment of a massive geometry playlist points out that the formula for the area of a circle is a relatively simple one. Using the formula, the presenter shows examples of finding the area of circles.
CK-12 Foundation
Three Dimensions in Two Dimensions: Lesson
Slice up solids. A portion of a geometry playlist introduces two conventional ways to visualize 3-D figures in 2-D. The resource defines cross-sections and nets and provides examples of both.
CK-12 Foundation
Prisms: Lesson
Set the bases of a conversation on prisms. The segment of a playlist on geometry introduces prisms and their parts. After visualizing prisms, the video discusses how to find the surface area and volume of prisms.
CK-12 Foundation
Pyramids: Lesson
Pyramids: they're not just in Egypt! The segment of a large geometry playlist introduces the formulas to find the volumes and surface areas of regular pyramids. Using the formulas, the presentation works several examples to ensure your...
CK-12 Foundation
Spheres: Lesson
Unwrap the surface of a sphere. A section of an extensive geometry playlist introduces the formulas for finding the surface area and volume of a sphere. The video includes a clip of how the surface area formula is developed by unwrapping...
CK-12 Foundation
Composite Solids: Lesson
Combine the formulas to arrive at one volume. Using the formulas for different solids, the video introduces finding the volume of composite solids. The portion of an extensive playlist on geometry works a couple of problems, one with an...
CK-12 Foundation
Calculating Areas of Sectors and Segments: Lesson
Find a slice of pi. The presentation talks through the process of finding the area of sectors and segments of circles. While working examples, the installment of an extensive geometry playlist uses the process to show the formulas for...
CK-12 Foundation
Reflection Symmetry: Lesson
Symmetry is a natural thing. The video introduces the concept of reflection symmetry using a smiley face and a pentagon. Using pictures from nature, the installment of an extensive geometry playlist determines whether the object has...
CK-12 Foundation
Area and Perimeter of Triangles: Lesson
Go from a parallelogram to a triangle. A segment of an extensive playlist on basic geometry shows the derivation of the formula for the area of a triangle. The resource works examples that require finding a missing side or height to...
CK-12 Foundation
Tessellations: Lesson
Build a pattern by rotating a figure around one of its vertices. A segment of an extensive playlist on basic geometry introduces the concept of tessellations through regular tessellations. The video shows how to create tessellations and...
CK-12 Foundation
Composing Transformations: Lesson
Double the transformations, double the fun! Using the knowledge of transformations, the video combines two transformations of figures on the coordinate plane. The segment of a geometry playlist, finds a single transformation that will...
CK-12 Foundation
Interior Angles in Convex Polygons: Lesson
How are angles and sides related? Given several regular convex polygons, the video shows how to calculate the sum of their interior angles. The segment in a playlist on geometry shows how to find the measure of one angle if the polygon...
Curated OER
What is a Square?
Add a global perspective to your next math lesson. This learners-created presentation shares things everyone needs to know when they are trying to determine if something is a square. She defines what a square is, provides real life...
Math Antics
Points, Lines and Planes
Geometry begins with a point. The video introduces the concepts of points, lines, and planes. Using diagrams, the presenter includes how to name the objects along with how to write the names. Previewing the concept of 3-D space ends the...
Curated OER
How Do You Use a Graph to Translate a Figure Horizontally?
Transformations. Learn a little bit of geometry. See how to translate a geometric figure on a coordinate plane horizontally by sliding it over. Simply pick a point on the figure and count the units you want to move it. Then repeat that...
Curated OER
How Do You Use a Graph to Translate a Figure Vertically?
Transformations. Learn a little bit of geometry. See how to translate a geometric figure on a coordinate plane vertically by sliding it over. Simply pick a point on the figure and count the units you want to move it. Then repeat that for...
Curated OER
What is a Rotation?
Transformations, isn't that geometry? The instructor illustrates how to rotate a shape around a fixed point on a graph, keeping the shape the same size.
Curated OER
How Do You Use a Graph to Translate a Figure Horizontally?
Transformations. Learn a little bit of geometry. See how to translate a geometric figure on a coordinate plane horizontally by sliding it over. Simply pick a point on the figure and count the units you want to move it. Then repeat that...
Curated OER
How Do You Use a Graph to Translate a Figure Vertically?
Transformations. Learn a little bit of geometry. See how to translate a geometric figure on a coordinate plane vertically by sliding it over. Simply pick a point on the figure and count the units you want to move it. Then repeat that for...
Curated OER
What is a Line of Reflection?
Line of reflection is basically a geometry term used in the transformation of figures. It identifies the line on the graph that you reflect a figure over. The line can be vertical, horizontal, and diagonal. Actually, it can be any line...
Curated OER
How Do You Use Complementary Angles to Find a Missing Angle?
Are complementary angles nice to each other? That's not what complementary means in math. Complementary angles are two angles that add up to 90 degrees and form a right triangle. So if given one value in a problem about complementary...
3Blue1Brown
Visualizing the Chain Rule and Product Rule | Essence of Calculus, Chapter 4
Take a look at the product rule and chain rule through the eyes of geometry. The fourth video in an 11-part series continues to explore derivative rules using geometry. An area model and a set of number lines help viewers...
Krista King Math
Inscribed Angles of Circles
Relationships in circles build from the many connections made throughout the geometry course. The instructor in the video explains these connections as she builds the concept of inscribed angles. Using examples, the narrator highlights...
Krista King Math
Volume of Cones
How much ice cream can you fit into a waffle cone? Sounds like geometry! Learners explore the process for calculating the volume of a right and oblique cone in this concept video. The instructor completes three examples of unique cones...
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