equal lengths can be established from the diagonals of rectangles (or, later, by pythagoras)
a powerpoint is here
show that the diagonals of kites cross at right angles
Friday 6 March 2020
grid geometry perpendiculars
it seems helpful to consider (and then define) perpendicularity in terms of a 'rotated' vector (through 90 degrees)
equal lengths can be established from the diagonals of rectangles (or, later, by pythagoras)
a powerpoint is here
show that the diagonals of kites cross at right angles
equal lengths can be established from the diagonals of rectangles (or, later, by pythagoras)
a powerpoint is here
show that the diagonals of kites cross at right angles
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