Lessons for 3.G.A.1
The quadrilateral family treeHow square, rectangle, rhombus, parallelogram, trapezoid and kite sit inside one another.Lesson
QuadrilateralsSquares, rectangles, parallelograms, rhombuses, trapezoids, and how they nest.Lesson
Rhombuses, rectangles and squaresA rhombus has four equal sides, a rectangle four right angles, and a square has both.Lesson
Shapes in more than one category, and quadrilaterals in noneA square is also a rectangle and a rhombus, while some four-sided shapes belong to none of those groups.Lesson
Sides, corners and sorting shapesGrouping flat shapes by number of sides, number of corners, or whether the sides are equal.Lesson
Printable Worksheets
The quadrilateral family tree worksheet (PDF)Printable worksheet with answer keyPreview
Rhombuses, rectangles and squares worksheet (PDF)Printable worksheet with answer keyPreview
Shapes in more than one category, and quadrilaterals in none worksheet (PDF)Printable worksheet with answer keyPreview
Sides, corners and sorting shapes worksheet (PDF)Printable worksheet with answer keyPreview