median
don steward
mathematics teaching 10 ~ 16

Wednesday, 20 May 2015

grid moves

the purpose of these tasks is to involve students in simplifying expressions
although the letters are not used as variables, it is also a simple introduction to vectors
and an application of 'pythagoras' to find (direct, crow flies) journey lengths










can be used to ask about journeys, e.g. from R to D
from D to R etc.


consider why the journey stages sum to 0




could involve 'pythagoras' in working out the lengths
















thanks to onlinedungeonmaster for this graphic

questions (9) and (10) contribute to an understanding of solving simultaneous equations

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