Videos from @SparksMaths

How can you find the centre of rotation if you're not sure where it is? Rotations around a point in 2D are nice when you can see them change dynamically. I'm using Geogebra Classic 5 on a PC, but this will work similarly on the mobile app, or in a browser.
GeoGebra: Rotation - find the centre - Transformations in under 1 minute #shorts #geogebra
Rotations around a point in 2D are nice when you can see them change dynamically. A classroom demo file built from scratch in less than in minute. I'm using Geogebra Classic 5 on a PC, but this will work similarly on the mobile app, or in a browser.
GeoGebra: Rotation - Dynamic Geometry Transformations in under 1 minute #shorts #geogebra
Making an interactive and moving demonstration of circle theorems helps reinforce what the situation is. You can do it very quickly and easily in GeoGebra. This one is for the fact that the angle from a chord to a tangent is equal to the angle off that chord in the alternate (other) segment. ALL CIRCLE THEOREMS LIVE HERE: https://www.geogebra.org/m/xkvz2EfF
GeoGebra: Alternate Segment Theorem - dynamic Circle Theorems in under 1 min #shorts #geogebra
Making an interactive and moving demonstration of circle theorems helps reinforce what the situation is. You can do it very quickly and easily in GeoGebra. This one is for the fact that a perpendicular bisector of a chord in a circle will always pass through the centre of the circle (and conversely, a line through the centre of a circle perpendicular to a chord will bisect it). ALL CIRCLE THEOREMS LIVE HERE: https://www.geogebra.org/m/xkvz2EfF
GeoGebra: Chord Bisectors - dynamic Circle Theorems in under 1 min #shorts #geogebra
Making an interactive and moving demonstration of circle theorems helps reinforce what the situation is. You can do it very quickly and easily in GeoGebra. This one is for the fact that opposite angles in a cyclic quadrilateral always add up to 180°. ALL CIRCLE THEOREMS LIVE HERE: https://www.geogebra.org/m/xkvz2EfF
GeoGebra: Cyclic Quadrilaterals - dynamic Circle Theorems in under 1 min #shorts #geogebra
Making an interactive and moving demonstration of circle theorems helps reinforce what the situation is. You can do it very quickly and easily in GeoGebra. This one is for the facts that the two tangents from a point to a circle are the same length, and tangents meet radii at right angles. ALL CIRCLE THEOREMS LIVE HERE: https://www.geogebra.org/m/xkvz2EfF
GeoGebra: Tangents to circles - dynamic Circle Theorems in under 1 min #shorts #geogebra
Making an interactive and moving demonstration of circle theorems helps reinforce what the situation is. You can do it very quickly and easily in GeoGebra. This one is for the fact that the angle in a semicircle is always 90°. ALL CIRCLE THEOREMS LIVE HERE: https://www.geogebra.org/m/xkvz2EfF
GeoGebra: Angle in a semicircle - dynamic Circle Theorems in under 1 min #shorts #geogebra
Making an interactive and moving demonstration of circle theorems helps reinforce what the situation is. You can do it very quickly and easily in GeoGebra. This one is for the fact that the angle off chord at the centre is always twice the angle off that chord to the edge. ALL CIRCLE THEOREMS LIVE HERE: https://www.geogebra.org/m/xkvz2EfF
GeoGebra: Angles at the centre - dynamic Circle Theorems in under 1 min #shorts #geogebra
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