Triangles according to its side and angles

2. As the meaning of the different
kinds of lines and angles will
be flashed, you will draw the
representation.

3. angle
•It is formed when two rays meet at
a common end point.
Example:

4. These are lines that do not
meet at any point.
• Parallel Lines

5. These are lines that cross
each other.
• Intersecting Lines

6. These are lines that intersect in a
special way forming a square
corners.
• Perpendicular Lines

7. It is an angle which measures 90 ̊
and it forms a square corner.
• Right angle

8. It measures less than 90 ̊.It is
smaller than a right angle.
• Acute angle

9. It measures more than 90 ̊but
less than 180 ̊.
• Obtuse angle

10. PHILIPPINE FLAG
Describe our flag.

11. The grade 4 pupils were assigned to
bring different objects with the shape
of a triangle. Jhedrian brought a
picture of a house. Jude showed a
picture of a traffic sign and Jay Edcel
prepared a triangular flaglet.

12. Observe the different triangular
objects. How will you describe the
different triangular objects?

19. How many equal sides does an isosceles triangle have?
How many equal sides does a scalene triangle have?
How many equal sides does an equilateral triangle have?

26. What kind of angle does an acute triangle have?
What kind of angle does an obtuse triangle have?
What kind of angle does a right triangle have?

28. Identify each figure below according
to sides or angles. Execute the
answers using the instructions given.

29. • Isosceles triangle

30. • right triangle

31. • scalene triangle

32. • obtuse triangle

33. • acute triangle

34. Assessment
Directions: Identify each figure below according to
sides or angles.

35. Assignment
Directions: Identify each triangle according to the measure of its sides and its angles.