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#### Resources tagged with Complex numbers similar to Rotations Are Not Single Round Here:

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##### Other tags that relate to Rotations Are Not Single Round Here
Reflections. Graph sketching. Families of Graphs. Dynamic geometry. Compound transformations. Symmetry. Rotations. Polyhedra. Interactivities. Matrices.

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Broad Topics > Numbers and the Number System > Complex numbers

### Napoleon's Theorem

##### Age 14 to 18 Challenge Level:

Triangle ABC has equilateral triangles drawn on its edges. Points P, Q and R are the centres of the equilateral triangles. What can you prove about the triangle PQR?

### 8 Methods for Three by One

##### Age 14 to 18 Challenge Level:

This problem in geometry has been solved in no less than EIGHT ways by a pair of students. How would you solve it? How many of their solutions can you follow? How are they the same or different?. . . .

### What Are Numbers?

##### Age 7 to 18

Ranging from kindergarten mathematics to the fringe of research this informal article paints the big picture of number in a non technical way suitable for primary teachers and older students.