Interactive macro-enabled MS-Excel spreadsheet. Contents: Find the first ten square numbers by drawing a series of squares. Find the first ten triangle numbers by drawing a series of circles. Find the first ten rectangle numbers by drawing a series of squares. Find the first five factorial numbers by drawing a series of squares. Find the first six powers of two by drawing a series of squares. Find a formula for number of cells C in a rectangular pattern. Find a formula for number of squares S in a triangular pattern. Find a formula for number of diagonals D in a regular polygon. Find a formula for number of cells C in a triangular star pattern. Find a formula for number of cells C in a compound shape pattern. Find a formula for number of cells C in a centred-square array. Find a formula for number of discs D in a centred-hexagonal array. Find a formula for number of regions R inside overlapping circles.
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