The document discusses the classification of triangles based on their angles, defining acute, right, and obtuse triangles, and their properties. It also includes activities for identifying triangles and assessing understanding through true/false statements. Additionally, the document encourages group participation and collaboration in learning about geometry.

1. QUARTER 1
WEEK 2 DAY 3

2. REMEMBER
The best way to learn
Mathematics is to do
Mathematics

3. Let’s Recall

4. Identify the following
triangles according to
their angles.

5. Identify the following triangles according to
their angles.
acute triangle
right triangle
obtuse
triangle
1

6. Identify the following triangles according to
their angles.
acute triangle
right triangle
obtuse
triangle
2

7. Identify the following triangles according to
their angles.
acute triangle
right triangle
obtuse
triangle
3

8. Let’s try

9. Arrange the given group
words to compose a
sentences.

10. Quadrilateral
Is a
figure
Quadrilateral is a 4-
sided figure.
4-sided

11. angle
An obtuse
triangle
90 degrees
has one
An obtuse triangle has
one angle greater
than 90 degrees.
greater than

12. angle that
Parallelogram
is
of parallel
a
quadrilateral
Parallelogram is a
quadrilateral with 2
pairs of parallel sides.
with 2 pairs

13. side of
The longest
the
hypotenuse
Is called
The longest side of a
triangle is called the
hypotenuse
a triangle

14. is called
leg
The shorter
a triangle
The shorter side of a
triangle is called leg
side of

15. Let’s explore

17. A triangle is a three-sided
figure with three vertices,
three sides, and three
angles.

18. A
B
C
Angle
Vertex
Sides

19. OBSERV
E
Hypotenuse
Leg

20. A triangle that is one
angle is exactly 90
degrees.
Right
Triangle

21. `
OBSERV
E

22. A triangle where all
three angles are less
than 90 degrees.
Acute
Triangle

23. `
OBSERV
E

24. A triangle with one
angle greater than 90
degrees
Obtuse
triangle

25. The total measure
angle of a triangle is
180˚.
REMEMBE
R

26. Lets try

27. Group
Activity

28. Group Rules
Get along
Respect other’s idea
On task
Use quiet voices
Participate
Stay in your group

29. It’s Your
turn

30. Identify the following
triangles according to
their angles.

31. Identify the following triangles according to
their angles.
acute triangle
right triangle
obtuse
triangle
1

32. Identify the following triangles according to
their angles.
acute triangle
right triangle
obtuse
triangle
2

33. Identify the following triangles according to
their angles.
acute triangle
right triangle
obtuse
triangle
3

34. Identify the following triangles according to
their angles.
acute triangle
right triangle
obtuse
triangle
4

35. Identify the following triangles according to
their angles.
acute triangle
right triangle
obtuse
triangle
5

36. It’s Your
turn

37. Identify the following
triangles according to
their angles.

38. Write T if the statement is True,
F if the statement is False.
1. Right triangle has
two right angle.

39. Write T if the statement is True,
F if the statement is False.
2. Scalene triangle has
all equal sides.

40. Write T if the statement is True,
F if the statement is False.
3. An obtuse triangle has
an obtuse angle which
measures more than 90˚
but less than 180˚

41. Write T if the statement is True,
F if the statement is False.
4. the total angle
measure of a triangle
is 190˚.

42. Write T if the statement is True,
F if the statement is False.
5. Right triangle has one
right angle which measures
exactly 90˚?

43. Using old calendars,
cut out different kinds
of triangles according
to its sides and angles.
Assignme
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