Puzzle
AlgebraPuzzle
Code breaker:Equation of a circle
Thirteen circles centred on the origin, each drawn: the radius or diameter from the equation, the equation from a point, a missing coordinate, then the gradient of a radius, the gradient of a tangent and where the tangent crosses the y axis. The Code Box includes the answers you get by forgetting to square root, or by changing the sign of the gradient without turning it upside down. One per A4.
A free GCSE algebra puzzle with answers, spec code A16. It goes with the lessons on equation of a circle and equation of a tangent to a circle.
Lesson
Equation of a circle
Lesson
Equation of a tangent to a circle
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