you and find
some triangles. Decide which angle
is the largest and check to see if it
the longest side.
Cut a triangle from
a piece of cardboard and see if it can
easily fall through the hole formed where
you cut it out.
On a card, draw
a triangle with all sides the same length (an
arcs around the triangle,
using each corner as the center
of a circle and the length of a side
of the triangle as the radius. (See
the diagram to right.)