Isosceles Triangles Poster Isosceles Triangles Poster - February 2005 Age 11 to 14 Challenge level Exploring and noticing Working systematically Conjecturing and generalising Visualising and representing Reasoning, convincing and proving Being curious Being resourceful Being resilient Being collaborative Problem Problem This poster is based on the problem Isosceles Triangles. The poster is available as a PDF, or the image below can be clicked on to enlarge it. Image