Categorizing Shapes and Partitioning
Aligned to 3.G.A.1 — Common Core State Standards for Mathematics.
What this lesson teaches
Shapes can be sorted into groups by what they share. For example, squares, rectangles, and rhombuses are all quadrilaterals because they each have 4 sides. You can also split a shape into equal parts and name each part as a unit fraction of the whole.
Worked example
A square has 4 sides, so it belongs to the quadrilateral group. Split that square into 4 equal parts and each part is 1/4 of the area.
Practice questions
- Name two shapes that are quadrilaterals.
- Why is a square a quadrilateral?
- If a rectangle is split into 6 equal parts, what fraction is each part?
Watch the lesson
Every lesson comes with a video taught in English and Spanish — the same video the QR code in the printed workbook opens.
▶ Watch this lessonEn español
Clasificación de figuras y partición
Las figuras se pueden agrupar según sus características comunes. Por ejemplo, los cuadrados, los rectángulos y los rombos son todos cuadriláteros porque cada uno tiene 4 lados. También puedes dividir una figura en partes iguales y nombrar cada parte como una fracción unitaria del total.
Ejemplo: Un cuadrado tiene 4 lados, así que pertenece al grupo de los cuadriláteros. Divide ese cuadrado en 4 partes iguales y cada parte es 1/4 del área.
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