Lessons for 2.G.A.1
Triangles, quadrilaterals, pentagons and hexagons from their sides and anglesShapes are named and drawn from what they must have, such as five sides or three corners, whatever their size.Lesson
Faces, edges and verticesThe flat surfaces of a solid, the lines where two faces meet, and the corners where edges meet.Lesson
Naming circles, triangles, squares and rectanglesTelling everyday flat shapes apart and calling each one by name.Lesson
Naming and describing solid shapesTelling solid shapes apart by name and spotting them in everyday objects.Lesson
Naming and classifying polygonsPentagon, hexagon, octagon and the rest, each named by how many sides it has.Lesson
QuadrilateralsSquares, rectangles, parallelograms, rhombuses, trapezoids, and how they nest.Lesson
Sides, corners and sorting shapesGrouping flat shapes by number of sides, number of corners, or whether the sides are equal.Lesson
Printable Worksheets
Triangles, quadrilaterals, pentagons and hexagons from their sides and angles worksheet (PDF)Printable worksheet with answer keyPreview
Faces, edges and vertices worksheet (PDF)Printable worksheet with answer keyPreview
Naming circles, triangles, squares and rectangles worksheet (PDF)Printable worksheet with answer keyPreview
Naming and describing solid shapes worksheet (PDF)Printable worksheet with answer keyPreview
Naming and classifying polygons worksheet (PDF)Printable worksheet with answer keyPreview
Sides, corners and sorting shapes worksheet (PDF)Printable worksheet with answer keyPreview