Proportional Co-Variation: Multiplication on the Reals
Proportional Co-Variation extends from the naturals to the reals.
Line segments are proportional to the real numbers they can represent.
For a fun applet showing multiplication via circles, goto http://bit.ly/Multiplication_with_a_Circle
For a fun applet showing division via circles, goto http://bit.ly/Division_with_a_Circle
For a fun applet showing square roots via semi-circles, goto http://bit.ly/Square_Roots_via_a_Semi-Circle
DRAG FACTOR A • ← or → and FACTOR B • ↑ or ↓ with your mouse.
MOVE IMAGE > Hold Shift and move the diagram on the screen with your mouse.
ZOOM IMAGE > Hold Shift and zoom in and out with your mouse wheel.
ENTER FACTORS > As well as dragging the factors with your mouse you can also enter factors into the A and B input boxes.
Reset the Applet to the default -ℯ × -π by clicking the icon top right [b](See further comments below the applet.)