id: 05711011
dt: j
an: 2010c.00326
au: Lavy, Ilana; Shriki, Atara
ti: Small change ‒ big difference.
so: Mont. Math. Enthus. 6, No. 3, 395-410 (2009).
py: 2009
pu: Information Age Publishing (IAP), Charlotte, NC; Department of Mathematical
Sciences, The University of Montana, Missoula, MT
la: EN
cc: G40
ut: affine geometry; problem solving; problem posing; triangle theorems;
generalizations
ci:
li:
ab: Summary: Starting in a well known theorem concerning medians of triangle
and using the ‘What If Not?’ strategy, we describe an example of an
activity in which some relations among segments and areas in triangle
were revealed. Some of the relations were proved by means of Affine
Geometry.
rv: