Organic shapes don't have names. They are random shapes that you make up.
The triangle and rhombus pattern block shapes can be combined to make up a trapezoid.
triangles
SQUARES
They are closed plane shapes which are bounded by five straight lines.
sqare
Squares and pentagons.
Two trapezoids can make up a hexagon.
There are technically many shapes that could be put into the form of a triangle, but only triangles can make real triangles (without getting into more complicated shapes).
Two triangles
octogons
A quadrilateral and a triangle