Texas Essential Knowledge and Skills (TEKS):
3.6.A
classify and sort two- and three-dimensional figures, including cones, cylinders, spheres, triangular and rectangular prisms, and cubes, based on attributes using formal geometric language;
Texas Essential Knowledge and Skills (TEKS):
3.6.B
use attributes to recognize rhombuses, parallelograms, trapezoids, rectangles, and squares as examples of quadrilaterals and draw examples of quadrilaterals that do not belong to any of these subcategories;
3rd Grade Math - Two- & Three-Dimensional Figures Lesson
A quadrilateral is a 4-sided figure.
trapezoid
parallelogram
rectangle
square
rhombus
A two-dimensional figure is a figure without thickness; it is flat.
A polygon is a two-dimensional figure made up of non-overlapping, straight line segments.
The point where two line segments meet is a vertex.