The perimeter of the rectangle is 26cm. How long is the red line?

SteveOsborn Richard Perring Yes, I love the book ‘Adapting and Extending Secondary Mathematics Activities’ by Prestage and Perks - one of the first tasks I tried from that is below and changed the way I teach this topic - small change but made a big impact

Preparing to be astounded by some brilliant CPD in the final session of today’s conference! Jo Morgan #senecacpd #topicsindepth

The first Live Virtual Maths Inspiration show today! (Matt Parker Rob Eastaway Zoe Griffiths Hannah Fry and me). Lots of fun - thanks to everyone who joined in. Particular thanks to @TrunkmanUK and ぁ❤︎ behind the scenes! Check mathsinspiration.com for more shows soon!

Does anyone know of a neat, well proportioned probability tree diagram maker that allows one to vary number of branches (not necessarily symmetric) and assign text/mathematical formulae for the probabilities and events? Robert J Smith Douglas Butler GeoGebra Desmos Autograph Maths