Hello lovely Year 11!

As we all know a Circle Theorem a day, keeps low marks away. So, here is the first one for you. Remember to write it out as many times as possible (put it on sticky notes?) and read it as many times as possible, too!

REMEMBER: You will only get full marks if you give the correct reason for your Circle Theorem answer.

Opposite angles in a CYCLIC quadrilateral add up to 180 degrees.

You must use the word CYCLIC, not just quadrilateral :-)

Here is one for you to try. Remember you must give a reason in full to justify your answer:

Thank you for the reading this post!