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The double angle formulae
Author:
Integral Resources
Topic:
Angles
The circle has radius 1 and centre at O. Drag the point D and compare - the two expressions for the length DE - the two expression for the length OE.
GeoGebra
New Resources
גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם
bewijs stelling van Pythagoras
Constructing Equilateral Triangles + Activities
Proving Triangles Congruent (2): One Step Transformations
Constructing an Isosceles Triangle with Given Side + Activities
Discover Resources
Geometriya 4.2
triangleParadox
dotplot 1
KudernaZ Ch8 Project
diagonals of rhombus
Discover Topics
Plane Figures or Shapes
Cosine
Bar Chart or Bar Graph
Rotation
Piecewise Functions