TED-Ed
TED-ED: The science of symmetry - Colm Kelleher
When you hear the word symmetry, you might think generally of triangles, butterflies, or even ballerinas. But defined scientifically, symmetry is _a transformation that leaves an object unchanged." Huh? Colm Kelleher unpacks this...
Curated Video
Gauge Theory Made Simple: How Symmetry Works in Quantum Physics
If you ask a physicist, what is at the core of physics, you will hear symmetry. What is symmetry? Gauge theory explained simply. Symmetry is about actions that don't change anything. If we take an equilateral triangle, and put a mirror...
Curated Video
Gravitational Force Equilibrium in a Triangle (Physics Problem & Solution)
Explore this classic gravitation problem where three masses form an equilateral triangle and a fourth mass is placed at the center. Learn how to calculate the mass required for gravitational force balance and why doubling the central...
Curated Video
Identify different types of triangle
Pupil outcome: I can identify different types of triangles and describe their properties. Key learning points: - All triangles have 3 straight sides and 3 vertices. - Equilateral triangles have 3 equal sides and 3 equal angles. -...
Curated Video
Explore, sort and classify triangles
Pupil outcome: I can sort triangles in different ways based on their properties. Key learning points: - There are three types of triangle - equilateral, isosceles and scalene. - Some triangles can also be described as right-angled...
Curated Video
Checking and securing understanding of properties of shapes
Pupil outcome: I can identify a shape from its properties and state the properties of a given shape. Key learning points: - Many shapes have similar properties. - It is not always clear which shape is being described so more details may...
Curated Video
Constructing triangles
Pupil outcome: I can use intersecting circles to construct triangles from given lengths. Key learning points: - A construction is an accurate drawing made using geometrical properties. - A scalene triangle can be constructed using...
Wonderscape
Finding the Perimeter of a Triangle: Simple Steps and Applications
To determine the perimeter of a triangle, you simply add the lengths of its three sides. Whether it’s a scalene triangle with different side lengths, an isosceles triangle with two equal sides, or an equilateral triangle where all sides...
Wonderscape
Understanding Triangles: Types, Properties, and History
Triangles have unique properties that define their shape, sides, and angles. They can be categorized based on their sides: scalene (all sides different), isosceles (two sides equal), and equilateral (all sides equal). Throughout history,...
Science ABC
Why is a Circle 360 Degrees, Why Not a Simpler Number, like 100?
A circle is 360 degrees But have you ever thought why is a circle not a simpler number, like 10 degrees or 100 degrees? As it turns out 360 is actually a very good number. From a purely mathematical standpoint, a number like 10 or 100...
Curated Video
Fractals: The Koch Snowflake
The characteristics of Koch's mathematical fractal are produced by following a set of simple rules, which result in an infinitely reducing pattern. Maths - Shape A Twig Math Film. Reinforce and extend the learning required by the...
Curated Video
Triangular Numbers Explained
This video explains what triangular numbers are and the patterns associated with them. Two puzzles are at the end of the video.
Curated Video
Reflections
Mr. Addit explains the term reflection. He also reflects various plane shapes across the line of symmetry and examines the reflected images.
Curated Video
The Line of Symmetry
Mr. Addit explains the line of symmetry, and examines a variety of plane shapes to find lines of symmetry.
Curated Video
Let's Talk about Triangles
Mr. Addit describes the four main types of triangles and explains what makes each type unique. He models drawing the four different triangles.
Curated Video
Review for You: Classifying Lines, Angles, and Triangles
Mr. Addit reviews points, lines, angles, and triangles and how to classify them.
Curated Video
GCSE Maths - Types of Triangle #100
This video covers the properties you need to know about the 4 types of triangles, namely equilateral triangles, isosceles triangles, right-angle triangles and scalene triangles. This video is suitable for maths courses around the world....
Curated Video
Congruent Figures and Lines of Symmetry
Mr. Addit defines the terms: congruent figures and lines of symmetry. He then models how to determine if figures are congruent and where lines of symmetry can be drawn.
Curated Video
Common Types of Triangles
Mr. Addit defines the terms; right triangle, hypotenuse, legs, equilateral, equiangular, isosceles, scalene, equiangular, obtuse, and acute.
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
Area: Equilateral Triangle
Area: Equilateral Triangle finds the area of an equilateral triangle by using a T chart to describe both the mathematical operations and the written explanations.
Curated Video
Attributes of Shapes
Attributes of Shapes identifies shapes by reviewing their characteristics.
Curated Video
Let's Talk about Triangles
“Let’s Talk about Triangles” describes the main types of triangles and explains what makes each type unique.
Curated Video
Classifying Triangles
Classifying Triangles explores the six types of triangles by defining the triangle types and classifying triangles by side length and angle measurement.