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.
Main - 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.
This leads to the next worksheet which has the three theorems at the top.
Finish off by leading Q12 to cyclic quadrilateral theorem.
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Hi. Thanks for a fine package. I wonder if it should be 180 degree in:<br /> “A cyclic quadrilateral is a quadrilateral where all 4 vertices lie on the circumference of the shape. Using the diagram below and a proof similar to the one above, prove the next theorem that opposite angles in a cyclic quadrilateral add up to 360◦” ?<br />
Great introduction, really useful and well set out<br />
Really worth the download
Great resource, as always!
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