Answer :
Diagram A is our original triangle.
We will say it
measures 5 inches (or 5 feet) on each side.
If we take off a slice at
the bottom of any equilateral triangle by a cut parallel with the base,
the portion that remains will always be an equilateral triangle; so we
first cut off piece 1 and get a triangle 3 inches on every
side.
The
manner of finding directions of the other cuts in A is obvious from the
diagram.
Now, if we want two triangles, 1 will be one of
them, and 2, 3, 4, and 5 will fit together, as in B, to form the
other.
If we want three equilateral triangles, 1 will be one, 4 and 5 will
form the second, as in C, and 2 and 3 will form the third, as in
D.
In
B and C the piece 5 is turned over; but there can be no objection to
this, as it is not forbidden, and is in no way opposed to the nature of
the puzzle.
