A set of resources for teaching GCSE circle theorems. Starter - in pairs, using only facts of straight lines, points, triangles etc. students work out some missing angles in circle. \n\nMain - using the arrow (this links to a MyMaths) play around with this theorem, getting students to realised the angle in semicircle theorem and that no matter where you drag the top of the arrow, it's always half the centre so doesn&'t change.\nThis leads to the next worksheet which has the three theorems at the top.\n\nFinish off by leading Q12 to cyclic quadrilateral theorem.
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