TMN3704 ASSIGNMENT 3 2026
DUE 8 JULY 2026
ACTIVITY 1
1.1 Define the concept of 2D shapes.
A two-dimensional (2D) shape is a flat geometric figure that has only two dimensions
length and width and lies completely in a single plane. Unlike three-dimensional objects,
2D shapes have no thickness or depth and are defined by their boundaries, which
consist of straight or curved sides
(Department of Basic Education [DBE], 2011a, p. 26).
1.2 Identify and explain any two key concepts from the definition of 2D shapes
given in (1.1). (4)
Key Concept 1: Dimensions (Length and Width)
Dimensions refer to the measurable extents that define a shape. Two-dimensional
shapes possess only two dimensions, length (how long the shape is) and width (how
wide the shape is). This distinguishes 2D shapes from 3D objects, which have a third
dimension, depth or height. For example, a rectangle drawn on paper has length and
width but no physical thickness
(TMN3704 Study Guide, 2024, p. 32).
,Key Concept 2: Plane
A plane is a flat, two-dimensional surface that extends infinitely in all directions. When
we say a 2D shape lies "in a single plane," it means all points of the shape exist on the
same flat surface without any elevation or depth. This concept is fundamental because
it explains why 2D shapes cannot be physically held like 3D objects; they are abstract
representations of flat surfaces. For instance, a triangle drawn on a chalkboard exists
entirely on the flat surface of the board (TMN3704 Study Guide, 2024, p. 33).
1.3 Carefully study the details of the topic as presented in the CAPS document
1.3.1 In which term(s) is the topic Properties of 2D shapes taught in Grade 5? (2)
According to the CAPS document for Grade 5 Mathematics, the topic "Properties of 2D
shapes" is taught in Term 1 and Term 3 (DBE, 2011a, p. 127).
1.3.2 How much time is allocated to the topic Properties of 2D Shapes in Grade 5?
(2)
The total time allocated to "Properties of 2D shapes" in Grade 5 is 8 hours - 4 hours in
Term 1 and 4 hours in Term 3 (DBE, 2011a, p. 127).
, ACTIVITY 2
2.1 As the first step to preparing an effective lesson, describe the aim of your
lesson for the identified topic. Refer to Table A.
The aim of this lesson is to teach/facilitate learners' understanding of angles in 2D
shapes by enabling them to recognise, identify, and describe right angles, angles
smaller than right angles, and angles greater than right angles within various polygons.
This lesson aims to build learners' foundational geometric knowledge that will prepare
them for more advanced angle concepts in Grade 6, including acute, obtuse, straight,
reflex, and revolution angles (DBE, 2011a, p. 26; TMN3704 Study Guide, 2024, p. 98).
2.2 Write down the two objectives that you want your learners to have achieved
by the end of the lesson. (2)
By the end of the lesson, learners will be able to identify and describe right angles in
given 2D shapes using the corner of a paper or a right-angle tester.
By the end of the lesson, learners will be able to compare and classify angles in 2D
shapes as either smaller than a right angle or greater than a right angle.
(DBE, 2011a, p. 26; TMN3704 Study Guide, 2024, pp. 94-95)
2.3 What prior knowledge do you think learners should bring to build on the
understanding of Recognition and description of angles in 2D shapes, with
special focus on angles smaller than right angles? (3)
Basic 2D shape recognition: Learners should be able to recognise and name basic
2D shapes, including squares, rectangles, triangles, pentagons, and hexagons, and
describe them in terms of straight sides and the number of sides (DBE, 2011a, p. 26).
DUE 8 JULY 2026
ACTIVITY 1
1.1 Define the concept of 2D shapes.
A two-dimensional (2D) shape is a flat geometric figure that has only two dimensions
length and width and lies completely in a single plane. Unlike three-dimensional objects,
2D shapes have no thickness or depth and are defined by their boundaries, which
consist of straight or curved sides
(Department of Basic Education [DBE], 2011a, p. 26).
1.2 Identify and explain any two key concepts from the definition of 2D shapes
given in (1.1). (4)
Key Concept 1: Dimensions (Length and Width)
Dimensions refer to the measurable extents that define a shape. Two-dimensional
shapes possess only two dimensions, length (how long the shape is) and width (how
wide the shape is). This distinguishes 2D shapes from 3D objects, which have a third
dimension, depth or height. For example, a rectangle drawn on paper has length and
width but no physical thickness
(TMN3704 Study Guide, 2024, p. 32).
,Key Concept 2: Plane
A plane is a flat, two-dimensional surface that extends infinitely in all directions. When
we say a 2D shape lies "in a single plane," it means all points of the shape exist on the
same flat surface without any elevation or depth. This concept is fundamental because
it explains why 2D shapes cannot be physically held like 3D objects; they are abstract
representations of flat surfaces. For instance, a triangle drawn on a chalkboard exists
entirely on the flat surface of the board (TMN3704 Study Guide, 2024, p. 33).
1.3 Carefully study the details of the topic as presented in the CAPS document
1.3.1 In which term(s) is the topic Properties of 2D shapes taught in Grade 5? (2)
According to the CAPS document for Grade 5 Mathematics, the topic "Properties of 2D
shapes" is taught in Term 1 and Term 3 (DBE, 2011a, p. 127).
1.3.2 How much time is allocated to the topic Properties of 2D Shapes in Grade 5?
(2)
The total time allocated to "Properties of 2D shapes" in Grade 5 is 8 hours - 4 hours in
Term 1 and 4 hours in Term 3 (DBE, 2011a, p. 127).
, ACTIVITY 2
2.1 As the first step to preparing an effective lesson, describe the aim of your
lesson for the identified topic. Refer to Table A.
The aim of this lesson is to teach/facilitate learners' understanding of angles in 2D
shapes by enabling them to recognise, identify, and describe right angles, angles
smaller than right angles, and angles greater than right angles within various polygons.
This lesson aims to build learners' foundational geometric knowledge that will prepare
them for more advanced angle concepts in Grade 6, including acute, obtuse, straight,
reflex, and revolution angles (DBE, 2011a, p. 26; TMN3704 Study Guide, 2024, p. 98).
2.2 Write down the two objectives that you want your learners to have achieved
by the end of the lesson. (2)
By the end of the lesson, learners will be able to identify and describe right angles in
given 2D shapes using the corner of a paper or a right-angle tester.
By the end of the lesson, learners will be able to compare and classify angles in 2D
shapes as either smaller than a right angle or greater than a right angle.
(DBE, 2011a, p. 26; TMN3704 Study Guide, 2024, pp. 94-95)
2.3 What prior knowledge do you think learners should bring to build on the
understanding of Recognition and description of angles in 2D shapes, with
special focus on angles smaller than right angles? (3)
Basic 2D shape recognition: Learners should be able to recognise and name basic
2D shapes, including squares, rectangles, triangles, pentagons, and hexagons, and
describe them in terms of straight sides and the number of sides (DBE, 2011a, p. 26).
