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AlgebraHigher

Equation of a circle

Circles centred on the origin, with a right-angled triangle from the centre to a point on the circle first. Read the radius and square it, then draw the circle from its equation, then decide whether a point is inside, on or outside.

A free GCSE Higher algebra lesson on equation of a circle, spec code A16. It has a lesson deck to teach from with a visualiser, a worksheet with answers, a puzzle, an exit ticket, an end of unit test and a method video.

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