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GeoGebra

GeoGebra is an internationally acclaimed dynamic maths program for education. It is free and multi-platform marrying geometry with algebra(hence its name).

project pages [ 1 ][ 2 ]

GeoGebra on the Net : a show-case of math projects from across the world
project
author/co-author
country

rhombus properties

David Freeston

Australia

rectangle properties

David Freeston

Australia

square properties

David Freeston

Australia

kite properties

David Freeston

Australia

circles - cyclic quadrilateral Guy Barmoha

U.S.A.

circles - perpendicular chord bisector

Guy Barmoha

U.S.A.

volume of a right circular cone

Lewis Prisco

U.S.A.

volume of a rectangular pyramid

Lewis Prisco

U.S.A.

volume of a sphere

Lewis Prisco

U.S.A.

volume of a cylinder

Lewis Prisco

U.S.A.

volume of a triangular prism

Lewis Prisco

U.S.A.

Pythagoras' Theorem

Michael C. Powell

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corresponding angles

Barbara Perez

U.S.A.

alternate angles

Barbara Perez

U.S.A.

area of a circle approximation, using trapeziums

Edward M. Knote

U.S.A.

area of a triangle in terms of base and height

Edward M. Knote

U.S.A.

area of a parallelogram

Edward M. Knote

U.S.A.

area of a trapezium

Edward M. Knote

U.S.A.

rotational symmetry of a square, triangle & pentagon

Edward M. Knote

U.S.A.

simultaneous equations

Alginon

U.K.

chord tangent L equals subtended L on circumference

Alginon

U.K.

reflections in axes

Alginon

U.K.

 

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