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Curated Video
When a 2D shape is decomposed and the parts rearranged, the areas remains the same
Pupil outcome: I can decompose a 2D shape and create a different shape from the parts and explain why the area of the new compound shape is the same as the original 2D shape. Key learning points: - The area of the compound shape is equal...
Curated Video
Explore symmetry by joining two identical shapes
Pupil outcome: I can compose symmetrical shapes from two identical shapes. Key learning points: - A shape is symmetrical when one half is a reflection of the other half. - When you fold a shape on a line of symmetry, the two halves will...
Curated Video
Representing 3D shapes in 2D
Pupil outcome: I can use isometric paper to draw a solid made from cuboids. Key learning points: - Isometric paper aids the drawing of a solid constructed from cubes. - The drawing will look 3D. - The final picture has three distinct...
Curated Video
Use part-part-whole structures to solve additive problems in a range of contexts
Pupil outcome: I can use knowledge of part-part-whole structures to solve additive problems in a range of contexts. Key learning points: - A representation helps to make sense of an equation or problem. - A bar model can be used to help...
Curated Video
Tessellated Designs
What is tessellation, where is it found, how does it work, and how did artist MC Escher translate it into geometric art? Maths - Shape A Twig Math Film. Reinforce and extend the learning required by the curriculum. Twig’s context films...
Curated Video
Types of Triangles
This video will explain the four types of triangles and their properties: right-angled, equilateral, isosceles and scalene triangles. Practice questions are at the end of the video.
Curated Video
Review for You: The Wonderful World of Geometry
Mr. Addit reviews geometry fundamentals including: points, lines, line segments, rays, perpendicular and parallel lines, acute, obtuse, and right angles, and isosceles, scalene, and equilateral triangles. He also reviews polygons...
Curated Video
Analyze Triangular Prisms to Find Surface Area
This video explains how to analyze triangular prisms by identifying and assessing pairs of congruent triangular faces. It discusses the concept of congruence and parallelism in 3D solids. The lesson highlights the different sizes and...
Let's Tute
Understanding Triangles: Types and Properties
This video explains the basic concepts of triangles, including the relationship between angles and sides, the properties of equilateral, isosceles, and scalene triangles, and the special case of right-angled triangles.
Curated Video
Comparing and Analyzing Triangles by their Sides
In this lesson, the teacher explains how to compare and analyze triangles by their sides. The lesson covers different types of triangles, including equilateral, isosceles, and scaling triangles, and how to identify them based on their...
Scholastic
Study Jams! Classify Triangles
Jam on with this multi-faceted activity teaching triangle classification. Start with a learner-paced lesson describing the different qualities of triangles and follow with a fun karaoke session. Also provided are two types...
Khan Academy
SAT Prep: Test 4 Section 2 Part 5
Picking up where he left off (problem 17), Sal demonstrates graphing functions with an informative and clear explanation. Additionally, problem 18 involves finding the values of angles in an equilateral triangle.
Khan Academy
SAT Prep: Test 1 Section 6 Part 5
Back with "more energy," Sal begins his explanation of problems 15-18 on page 412 of The Official SAT Study Guide. Problems include angles of equilateral triangles, rectangles, and graphing slopes.
Flipped Math
Triangles
Take time to tackle triangles. Scholars watch a video that first reviews the types of triangles. They then investigate the Isosceles Triangle Theorem and see how to apply it to solve problems. At the end, individuals also learn how to...
Corbett Maths
Hexagon Inscribed Within a Circle
Mark off the length of the radius around the circle. Using a compass, the presenter shows how to construct a regular hexagon in a circle. Pupils see how triangles formed in the hexagon are equilateral, allowing for the construction to...
Corbett Maths
Constructing Equilateral Triangles and 60 Degree Angles
Creating a 60-degree angle also creates an equilateral triangle. By watching the video, individuals learn the steps required to construct a 60-degree angle. The presentation shows that the process is the same for constructing an...
CK-12 Foundation
Equilateral Triangles: Lesson
Take a second look at triangles that are equal all the way around. The video reminds viewers what an equilateral triangle is and points out that the three angles are the same. Using the fact that equilateral triangles are also isosceles,...
CK-12 Foundation
Classifying Triangles: Lesson
That's correct, it is right and scalene. The video introduces the two methods for classifying triangles, sides, and angles. A resource in the playlist for basic geometry provides the definitions for each of the classifications.
Math Antics
Triangles
What has three sides and is adorable? A-cute triangle. The resource introduces triangles and how to classify them by sides and angles or both. The video concludes with using the sum of the angles of a triangle to show how to solve for a...
TED-Ed
Why Are Manhole Covers Round?
Discover the peculiar geometric property of the curve of constant width, the Reuleaux triangle, and their intriguing connection to manhole covers with yet another fascinating TED-Ed video.
Curated OER
Why Are the Angles of Equilateral Triangles Always Equal to 60¼?
Learn how to identify an equilateral triangle by evaluating its congruent sides. Once you've determined that that sides are congruent you'll be able to use the triangle sum theorem to determine the angles in an equilateral triangle. This...
Curated OER
What are Equilateral, Isosceles, and Scalene Triangles?
Triangles are classified by their angle measurement as well as by the length of their sides. Here are some names that identify the types of triangles: right, isosceles, equilateral, scalene, obtuse, and acute. Watch this video to learn...
Curated OER
What is a Regular Polygon?
What makes a polygon a regular polygon? Does this mean there are irregular polygons? For a polygon to be classified as a regular polygon, all the sides must be congruent and all the angles must be congruent. Those are the two rules that...