UK Secondary (7-11)
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Proofs and Theorems involving Circles

Interactive practice questions

In the diagram, $O$O is the centre of the circle. Show that $x$x and $y$y are supplementary angles.

Approx 4 minutes
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Prove that if the angle $\angle ABC$ABC is a right angle then $AC$AC is a diameter..

Prove that $x=y$x=y.

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