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A plane is a flat surface which can be extended in both directions. +
*Geometrically visualising algebra
*Geometrically visualising algebra
===Notes for teachers===
===Notes for teachers===
−*A plane is a flat surface which can be extended in any directions.
−coordinate geometry gives us a way to describe a point exactly by two numbers.
+*coordinate geometry gives us a way to describe a point on the plane exactly by two numbers.
===Activities===
===Activities===