A geoboard is a mathematical manipulative used to explore basic concepts in plane geometry such as perimeter, area and the characteristics of triangles and other polygons. It consists of a physical board with a certain number of nails half driven in, around which are wrapped geo bands that are made of rubber. Normal rubber bands can also be used. Geoboards were invented and popularized in the 1950s by Egyptian mathematician Caleb Gattegno (1911-1988). (Wikipedia).
From playlist GeoGebra Geometry
From playlist GeoGebra Geometry
GeoGebra 3D Calculator: When to Use?
GeoGebra 3D Calculator is one of the five apps in Calculator Suite. https://www.geogebra.org/calculator
From playlist GeoGebra Apps Intro: Which to USE?
A very quick demo of how to access the 2D and 3D calculator on Geogebra.
From playlist Geogebra
Modeling a 2-Piece Candle Holder in GeoGebra Augmented Reality
Math Teachers: Students can use GeoGebra Augmented Reality to create surfaces formed by rotating the graph of a function y = f(x) about the x-axis! Here's how: https://www.geogebra.org/m/RKYFdQJy#material/kPNmmHgj.
From playlist GeoGebra Augmented Reality (older iOS app)
How to Create a GeoGebra Class from an Activity
More info: https://www.geogebra.org/m/hncrgruu#material/mxc255j6 #GeoGebra
From playlist GeoGebra Classroom: Quick Tutorials
Intersection of Planes on Geogebra
In this video, we look at a strategy for finding the intersection of planes on Geogebra.
From playlist Geogebra
3D Composite Solid Modeling in GeoGebra 3D
Just for fun: Composite solid modeling in #GeoGebra #3d & #AugmentedReality using geometric transformations. https://www.geogebra.org/m/thjnm4zc #MTBoS #ITeachMath #math #maths #EdTech #mathematics #geometry #HSMath #HSMathChat #GeomChat
From playlist GeoGebra 3D with AR (iOS): Explorations, Demos, and Lesson Ideas
Introduction to Geometer's Sketchpad: Measurements
This video demonstrates some of the measurement and calculation features of Geometer's Sketchpad.
From playlist Geometer's Sketchpad
Lehmer Factor Stencils: A paper factoring machine before computers
In 1929, Derrick N. Lehmer published a set of paper stencils used to factor large numbers by hand before the advent of computers. We explain the math behind the stencils, which includes modular arithmetic, quadratic residues, and continued fractions, including my favourite mathematical vi
From playlist Joy of Mathematics