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.
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.
The first time I used the resource, a surprising number of students who were very confident didn’t spot quite a few of them.
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Very clear and carefully designed slides, developing a real depth of understanding of exterior angles.
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