A trapezoid and a triangle can make a triangle or another trapezoid, among others.
A trapezoid and a triangle make a paralellogram.
-- trapezoid -- triangle -- irregular quadrilateral -- pentagon -- hexagon etc.
No because a trapezoid has 4 sides and a triangle has three if a trapezoid had three then it would be a triangle. If you had 3 trapezoids you could make a triangle!
Two trapezoids can make up a hexagon.
A big triangle if you put the triangle on the trapezoid's short parallel side, or a parallelogram if you put it on one of the trapezoid's ends. In both cases the triangle must be exactly the right shape and size or you will only have an irregular quadrilateral, pentagon, or hexagon. (Placing an appropriately-sized triangle on the long parallel side will also yield a pentagon - likely irregular.) Additionally, if a vertex of the triangle touches the trapezoid it can also make an irregular concave heptagon!
triangle circle square octagon pentagon hexagon trapezoid
If the triangle and hexagon are equilateral, then the trapezoid is not like the others because all of its angles are not equal. A rectangle will have 4 equal right angles. An equilateral triangle will have 3 equal acute 60 degree angles. An equilateral hexagon will have 6 equal obtuse 120 degreeangles.
pentagon i think?
No. A trapezoid is a shape with four sides, while a hexagon is a shape with six sides.