<p>This resource was to designed to help students find exterior angles when multiple polygons are involved in a problem. The goal was to involve no calculation whatsoever.</p> <p>I used some non-examples (inspired by Johnathan at Mathsbot) and wanted to ensure I mixed in parallel lines, which we as a dept cover earlier in the unit.</p> <p>The first time I used the resource, a surprising number of students who were very confident didn’t spot quite a few of them.</p>