don steward
mathematics teaching 10 ~ 16

Saturday, 19 January 2013

coordinates of quadrilaterals

drawing various quadrilaterals can be introduced without these resources - asking students to, for example, draw as many different parallelograms as they can with the corners on the (integer/whole) points of  a 6 by 6 grid

to gain an understanding of the relationships between corners of the various quadrilaterals might need some 'nudging' to consider the number of steps across and up from one corner (vertex) to another (i.e. a vectorial approach)

there are common relationships for all parallelograms
what distinguishes e.g. a rectangle from a parallelogram?
how can you see this from the coordinates?

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