00:57:00

#### Henry Briggs’ 400 years of geometry at Gresham College

Henry Briggs was the first Gresham Professor of Geometry. In this lecture he describes the College's early days, and surveys the history of the Geometry Chair over the succeeding 400 years.

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00:55:00

#### The Story of pi

The 'circle number' pi has fascinated people for thousands of years. Who first called it pi? who had it engraved on their tombstone? who tried to pass a law declaring it to be 3.2? how can we find pi by tossing needles? and can one square the circle?

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