The document outlines a math curriculum for the first quarter, focusing on the properties and classifications of triangles and quadrilaterals. Learners will identify, draw, and understand different types of triangles (equilateral, isosceles, scalene) and quadrilaterals (square, rectangle, parallelogram, trapezoid) based on their sides and angles. Activities encourage exploration and application of geometric concepts through real-life examples and interactive tasks.

1. MATH 4
QUARTER 1 WEEK 2

2. Learning
Competencies
The learners will be able to:
1. Draw and state the
properties of triangles and
quadrilaterals.
2. Classify triangles and
quadrilaterals according to
sides and angles.

3. Learning
Objectives
At the end of the lesson the
learners will be able to:
1. Identify and draw different types
of triangles based on their sides
and angles.
2. State the properties of equilateral,
isosceles, and scalene triangles.
3. Differentiate between acute,
obtuse, and right-angled triangles

4. Exploring the
Properties of
Triangles
DAY 1

5. What do you know
about triangles?

6. Look at the images of triangles
below.
1. How would you classify each triangle based on
the length of its sides?
'Equilateral' for triangles with all sides of equal
length. 'Isosceles' for triangles with two sides of
equal length.
'Scalene' for triangles with all sides of different

7. 2. Can you classify each triangle according to its
angles?
'Acute' for triangles with all angles less than 90
degrees. 'Obtuse' for triangles with one angle
greater than 90 degrees.
'Right' for triangles with one angle exactly 90

8. Take a look at these triangles.
• Classify each triangle using both the side length
and angle classifications you've learned.
• Write down the name that describes each triangle
best, considering both sides and angles."

9. Today you will learn
about the different
types of triangles
and their
properties.

10. "Say-It-Repeat-It“
'Equilateral' for triangles with all sides
of equal length.
'Isosceles' for triangles with two sides
of equal length.
'Scalene' for triangles with all sides of
different lengths.

11. "Say-It-Repeat-It“
'Acute' for triangles with all angles less
than 90 degrees.
'Obtuse' for triangles with one angle
greater than 90 degrees.
'Right' for triangles with one angle
exactly 90 degrees."

12. TYPES OF TRIANGLES
ACCORDING TO SIDES
• Triangles may be classified according to their sides. The kinds
of triangles according to their sides are the equilateral,
isosceles and scalene triangles.

13. Equilateral triangles
• An equilateral triangle is a triangle with three equal sides.
• The triangles below are all equilateral triangles. They have
three equal sides.

15. • The symbols “I”, or “II”, etc. are used to mark parts of figures.
• When parts of the same or of different figures are marked
using the same symbols, that means those parts have equal
measures or are congruent.

16. Isosceles triangles
• An isosceles triangle is a triangle with two equal sides.
• The triangles below are isosceles triangles. They have two
equal sides.

18. Scalene triangles
• A scalene triangle is a triangle with no equal sides. The
triangles below are scalene triangles. They have no equal
sides.

19. Examples of Scalene Triangle

20. ACTIVITY 1

21. ACTIVITY 2

22. • Summarize the
properties of each type of
triangle in your own
words.
Generalizations And
Abstractions

23. ACTIVITY 3

24. ACTIVITY 4

25. Learning
Objectives
At the end of the lesson the
learners will be able to:
1. Identify and draw different types
of quadrilaterals.
2. State the properties of squares,
rectangles, parallelograms, and
trapezoids.
3. Understand the concept of
opposite sides and angles in
quadrilaterals

26. Discovering the
Properties of
Quadrilaterals
DAY 2

27. What do you know
about
quadrilaterals?

28. Types of Quadrilateral:

29. Everyday Quadrilaterals:
Think about objects you
encounter daily. Choose one
object and describe which
type of quadrilateral it
resembles the most.

30. Drawing Quadrilaterals:
Draw a picture of your dream
house. Make sure to include at
least two different types of
quadrilaterals in your drawing.
Label the shapes you've used
and explain why you chose each
shape for a particular part of the
house

31. • One of the most common plane figures is the group of
quadrilaterals.
• Quadrilaterals are polygons with 4 sides and 4 angles.
In this lesson, you will learn to identify and describe
the different kinds of quadrilaterals.

32. "Say-It-Repeat-It“

33. Quadrilateral is a polygon with 4 sides and 4 angles.
• There are different kinds of quadrilaterals. Some
quadrilaterals have special properties and have been given
special names. These are the square, the rectangle, the
parallelogram, the trapezoid and the rhombus.

34. The following are different kinds of quadrilaterals:
• A parallelogram is a quadrilateral with 2 pairs of parallel
sides and its opposite sides are equal.

35. • A rectangle is a parallelogram with 4 right angles.

36. •Its opposite sides are equal. A rhombus is a
parallelogram with 4 equal sides.

37. • A square is a parallelogram with 4 right angles and 4 equal
sides.
• A square has four equal sides and opposite sides are parallel.
All four corners are right angles or measure 90.

38. •A trapezoid is a quadrilateral with only one pair of
opposite sides that are parallel.

39. ACTIVITY 1

40. • Summarize the properties
of each type of quadrilateral
and explain the concept of
opposite sides and angles.
Generalizations And
Abstractions

41. ACTIVITY 2

42. ACTIVITY 2

43. • Identify quadrilaterals
in the environment.
Additional Activity:

44. Learning
Objectives
At the end of the lesson
the learners will be able to:
1. Define and identify
triangles and
quadrilaterals.
2. Recognize the basic
properties of triangles
and quadrilaterals.

45. Introduction to
Triangles and
Quadrilaterals
DAY 3

46. Do you know
what triangles
and quadrilaterals
are?

47. 1. What is a triangle? How many sides and
angles does a triangle have?
2. Can you name and describe different
types of triangles based on their side
lengths and angles?
3. Imagine you have a triangle with one
angle measuring 90 degrees. What is
this type of triangle called?

48. 4. What is a quadrilateral? How does it
differ from a triangle in terms of the
number of sides and angles?
5. Can you identify a quadrilateral with all
sides of equal length and all angles at 90
degrees? What is this type of quadrilateral
called?

49. Triangles
Based On
Their Sides
And
Angles

50. Quadrilaterals Based On Their
Properties

51. 1. What do you notice about the angles
and sides of a right triangle?
2. Can you identify any real-life examples
of parallelograms?
3. How is an equilateral triangle different
from an isosceles triangle?
Answer the following
questions:

52. Pronounce each syllable clearly.
Repeat After Me:
Quadrilateral Triangle
Square Scalene
Rectangle Isosceles
Parallelogram Equilateral
Trapezoid Acute
Rhombus Obtuse
Right

53. Identify each triangle according to its
sides.

54. Direction: Name the following quadrilaterals.

55. ACTIVITY 1

56. A triangle
always has
three sides
connecting
three
vertices
(corners).
Triangles Have Three Key
Properties:
Three Sides: Interior
Angles Add
Up:
Three
Angles:
Triangles
also have
three angles
formed by
the
intersection
of their
sides.
The sum of
the interior
angles in
any
triangle is
always 180
degrees.

57. A
quadrilateral
always has
four sides
connecting
four vertices.
Properties Of Quadrilaterals:
Four Sides: Interior
Angles Add
Up:
Four Angles:
Quadrilateral
s also have
four angles
formed by
the
intersection
of their sides.
The sum of
the interior
angles in
any
quadrilatera
l is always
360

58. Examples of Triangle:

59. Examples of Quadrilateral:

60. • Share what you've learned
about triangles and
quadrilaterals.
Generalizations And
Abstractions

61. ACTIVITY 2

62. ACTIVITY 3

63. Learning
Objectives
At the end of the lesson the
learners will be able to:
1. Identify and classify triangles
based on their sides
(equilateral, isosceles, scalene).
2. Understand the differences
between the different types of
triangles.

64. Classifying
Triangles
by Sides
DAY 4

65. Review:
1. How many sides does a
triangle and quadrilateral
have?
2. The sum of the interior
angles in any quadrilateral
is always __________
degrees.
3. The sum of the interior
angles in any triangle is
always _________ degrees.

66. Today you will learn
about classifying
triangles based on
their sides.

67. To classify a triangle based on its
sides,
follow these steps:
• Measure or determine the lengths of the
three sides of the triangle.
• Compare the side lengths:
• If all three sides are equal, the triangle is
equilateral.
• If two sides are equal and one is different,
the triangle is isosceles.
• If all three sides are different, the triangle
is scalene

68. Practice Saying The Words
Equilateral: e-qui-lat-er-al
Isosceles: i-sos-ce-les
Scalene: sca-le-ne

69. Role Play:
• Divide learners into groups.
• Assign each group a type of
triangle.
• Work together to create sentences
or short descriptions using the
assigned term.
• For example, "We are an equilateral
triangle, and all our sides are
equal."

70. Role Play:
• Divide learners into groups.
• Assign each group a type of
triangle.
• Work together to create sentences
or short descriptions using the
assigned term.
• For example, "We are an equilateral
triangle, and all our sides are
equal."

71. Types Of Triangle
'Equilateral' for triangles with all sides of equal
length.
'Isosceles' for triangles with two sides of equal length.
'Scalene' for triangles with all sides of different

72. Equilateral Triangle Example:
• This type of sign has three equal sides, which
aligns with the definition of an equilateral
triangle.
•

73. Isosceles Triangle Example:
• The two sides of the roof are equal in length, while
the base is different. This corresponds to the
definition of an isosceles triangle, where two sides
are equal.

74. Scalene Triangle Example:
• The sides of the trail on the map have different
lengths, which aligns with the characteristics of a
scalene triangle.
• Note that all three angles in this triangle also have
different measures.

75. ACTIVITY 1

76. • Describe the differences
between equilateral, isosceles,
and scalene triangles.
Generalizations And
Abstractions

77. ACTIVITY 2

78. Who am I? Identify the kind of triangle and draw an example
of each. Write your answer on a separate sheet of paper.
• 1. I am a triangle with no sides equal.
• 2. I am a triangle with 3 equal sides.
• 3. I am a triangle with an obtuse angle.
• 4. I am a triangle with 2 equal sides.
• 5. I am a triangle with a 900 angle.
Additional Activity:

79. Learning
Objectives
At the end of the lesson the
learners will be able to:
1. Classify quadrilaterals based
on their angles (square,
rectangle, and parallelogram,
trapezoid).
2. Understand the unique
features of each type of
quadrilateral.

80. Classifying
Quadrilaterals by
Angles
DAY 5

81. Review:
Triangles:
1. How many sides does a
triangle have?
2. If a triangle has one angle
that measures 90 degrees,
what type of triangle is it
called?
3. Can a triangle have two
sides of the same length?
What is this type of triangle

82. Review:
Quadrilaterals:
1. What is a quadrilateral?
2. If a quadrilateral has all
sides of equal length, what do
we call it?
3. Draw a square and label its
sides and angles.

83. Today you will learn
about classifying
quadrilaterals
based
on their angles.

84. Quadrilaterals Based On Their Angles

85. ACTIVITY 1

86. Pronunciation Practice:

90. Hands-on Activity
Identify angles or sort them
into categories based on their
properties.
1. Square
2. Rectangle
3. Parallelogram
4. Trapezoid
5. Rhombus

91. Real-world Examples of each
Type of Quadrilateral

96. • Describe the unique angles
of squares, rectangles,
parallelograms, and
trapezoids.
Generalizations And
Abstractions

97. ACTIVITY 2

98. • Create your own drawings of
each type of quadrilateral
and label the angles.
Additional Activity: