Answer: A circle (two of them) and a rectangle.
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use 4 triangles, make 2 trapezoids then put them into a hexagon
You could use two isosceles triangles, or two parallelograms with one pair of sides half as long as the other, suitable trapeziums (trapezia?). There are also lots of irregular shapes.
A graduated cylinder would work.
Identify shapes of common objects. Identify faces, vertices, and edges of solid shapes; sort solid objects by faces, edges, and vertices. Relate solid shapes and plane shapes. Identify and count vertices and sides of shapes. Use shapes, such as pattern blocks, to make new shapes. Identify the movement of a shape as a slide, flip, or turn. Recognize and draw congruent figures
The difference is that two-dimensional shapes have a length and a width while three-dimensional shapes have a length, width, and depth. While some examples of two-dimensional shapes are circle, rectangle, and triangle, example of three-dimensional figures are a sphere, cuboid, and a pyramid.