Diminishing Fraction Diagrams - rich tasks

(N.B: Now including answers!) A series of rich tasks / starting points based on the theme of diminishing areas. They could be a lesson each or just pick two or three as a progression over one lesson. Areas covered: equivalent fractions, adding fractions, powers (‘half of a half…’), pie charts (angles and percentages), and infinite sums (Challenging!) Diagrams are a mixture of my own, those from NRich and also from ‘Don Steward - Median’ See lttMaths.com for further ideas and resources about teaching mathematics.