This document provides information about triangles, quadrilaterals, and polygons for a 3rd quarter math class. It defines triangles as shapes with three sides and three angles that add up to 180 degrees. Quadrilaterals are defined as polygons with four sides, four angles, and four vertices that can be divided into two triangles. The document includes examples of identifying different shapes, dividing illustrations boards into triangles, and assessment questions about properties of triangles and quadrilaterals.

1. Math 4
3rd QUARTER
(Week 2)
ALICIA C. SABALLA
Grade 4 Math Teacher

2. Describes the
attributes/properties of triangles
and quadrilateral using concrete
objects or models
Competency:

3. DRILL:
Identifying the kinds of angle
represented by each of the following
figure.

4. Study the Following Object presented:

5. A TRIANGLE is a simple closed curve or polygon which is
created by three line segments. A triangle is a shape or a part
of two dimensional space. It has three straight sides and three
vertices. The three angles of a triangle always add up to 180
degrees. It is polygon with the least possible number of sides.
A POLYGON is a closed figure made up of several line segments
that are joined together. The line segments are called sides and
do not cross each other. There are exactly two sided that meet
at a point.

6. Direction: Read and Analyze.
Mr. Garcia bought an illustration board for his Math
class. He needs two triangles of the same size without wasting
any part of the illustration board. How will he divide it?

7. Study the following figures:

8. A QUADRILATERAL is a polygon with 4 sides, 4
vertices and 4 angles.
Can a quadrilateral can be divided into two triangles?
Any quadrilateral can be divided into two triangles as shown in
the images below.

9. Activity
Directions: Beside the number, put a circle on the quadrilateral and
box on the triangle. If it is not quadrilateral or a triangle, leave it
blank.

10. Assessment
Directions: Answer the following questions. Write the letter of the correct answer on a sheet of
paper.
1. Which property allows you to name a quadrilateral?
A. five sided figure C. three sided figure
B. four sided figure D. two sided figure
2. Which of the following is not a polygon?
A. quadrilateral C. semi-circle
B. pentagon D. pentagon
3. How many sides a triangle have?
A. three B. four C. five D. six
4. What is the sum of the interior angle in a triangle?
A. 90 B. 180 C. 220 D. 360
5. What is a polygon?
A. A closed figure made up of crossed line segments
B. A closed figure made up of straight line segments
C. An open figure made up of crossed line segments
D. An open figure made up of straight line segments

11. Assignment
Directions: Draw an object with four angles and
three angles.

12. THANK YOU!