2D and 3D Shapes · B2 Mathematics

Lesson notes

Learning Objectives

Indicator: B2.3.1.1.3 - Create two-dimensional shapes based on given attributes, including number of sides and vertices.

By the end of the lesson, learners can:

State the number of sides and vertices of common 2D shapes (square, triangle, rectangle, circle, pentagon, hexagon) without looking at the shape.
Draw a 2D shape when given the number of sides and vertices (e.g., draw a shape with 3 sides and 3 vertices).
Create a 2D shape from a verbal description, such as “a shape with 4 equal sides and 4 vertices.”
Identify the 2D faces of 3D objects in the classroom and environment (e.g., the circular face of a bucket or the rectangular face of a door).
Justify their created shapes by counting and stating the sides and vertices aloud.

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Curriculum details

Strand: Geometry and Measurement (Strand 3)
Sub-strand: 2D and 3D Shapes (3.1)
Content standard: B2.3.1.1 - Describe and analyse 2D shapes and 3D objects.
Indicator: B2.3.1.1.3 - Create two-dimensional shapes based on given attributes, including number of sides and vertices.
Suggested placement: Term 3, Week 1 (Week 25 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: Mathematics Curriculum for Primary Schools (Basic 1-3), 2019, p. 34
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

E.g. 1. Identify the 2D faces of a given 3D object
E.g. 2. Identify 3D objects in the environment that have parts similar to a given 2D shape (find the parts of a can or bucket that are similar to a circle)
E.g. 3. learners identify the number of sides, faces and vertices of 2D plane figures
E.g. 4 learners draw 2D shapes with given sides or vertices