Can you make a parellogram out of 2 triangles?

Answer 1

Sometimes yes, usually no.

When you cut up two triangles, you have 6 pieces of straight line. If you have

two pieces that are the same length, and another two that are also equal, then

you can use those two pairs to make a parallelogram. Plus you still have two

pieces of straight line left over that you might be able to sell on ebay.

If you can't make two pairs of equal-length lines somehow out of the 6 pieces,

then there's no way to make a parallelogram out of all that wreckage, and all

you've accomplished was to ruin two perfectly good triangles.