Texas Essential Knowledge and Skills (TEKS)
TX.111.3. Grade 1, Adopted 2012
1.6. Geometry and measurement. The student applies mathematical process standards to analyze attributes of two-dimensional shapes and three-dimensional solids to develop generalizations about their properties. The student is expected to:
1.6 (A) Classify and sort regular and irregular two-dimensional shapes based on attributes using informal geometric language.
1.6 (B) Distinguish between attributes that define a two-dimensional or three-dimensional figure and attributes that do not define the shape.
1.6 (D) Identify two-dimensional shapes, including circles, triangles, rectangles, and squares, as special rectangles, rhombuses, and hexagons and describe their attributes using formal geometric language.