Preview of Changing Ratios Changing Ratios Interactive ratio-changing coin problems with non-algebraic scaling diagrams and algebraic solutions. Preview of Ratio Scaling Ratio Scaling Interactive ratio scaling gap-fill task converting between simplest form, unit ratios, totals and differences. Preview of Ratio Sharing Ratio Sharing Interactive sharing in a ratio questions for area and perimeter, shown one at a time with revealable solutions. Preview of Using Ratios to Find Angles in Polygons Using Ratios to Find Angles in Polygons Ratio and angle questions for polygons, where students divide angle sums to find missing angles. Preview of Using Ratios to Find Angles Using Ratios to Find Angles Ratio and angle questions where students divide straight-line, around-a-point and triangle angles.