SEMI-DETAILED LESSON PLAN IN MATHEMATICS 8
I.
OBJECTIVES
At the end of the lesson, students are able to:
 define undefined terms point, line and plane;
 differentiate collinear from non-collinear points, coplanar
from non-coplanar:and
 represent point,line and plane using concrete and pictorial
models.
II.
SUBJECT MATTER: MATHEMATICS 8 (GEOMETRY)
Sub-Topic: MATHEMATICAL SYSTEM -Undefined Terms (POINT, LINE
and PLANE)
Reference: Mathematics 8-Quarter 3 Module 1- Mathematical SystemDepEd Bulacan Module
Materials: Projected Materials: Laptop, Powerpoint Presentation
III. PROCEDURE:
A. Preparation
A.1 Opening Prayer
A.2 Greeting of the class
A.4 Checking of Attendance
A.5. Motivation
“4 PICS 1 WORD”
B. Lesson Proper


The teacher will introduce concepts relating to Mathematical System
After this, the class will be engaged in the discussion of the content of the
module.
Mathematical Systems Mathematical System is a structure formed from one
or more sets of undefined objects, various concepts that may or may not be
defined, and a set of axioms relating these objects and concepts. (McGrawHill Dictionary) Geometry, as branch of mathematics that deals with earth
measure, is a mathematical system. The study of the mathematical system
starts with undefined terms. From the understanding of undefined terms, one
can define additional terms. Once the terminology is sufficiently developed,
certain properties of the system are made known. These properties are known
as axioms and postulates of the system. Generally, these statements are called
assumptions. Interconnecting terms and postulates logically using deductive
methods of reasoning, these statements are termed theorems. Let us follow
this diagram to understand the parts of the mathematical system in geometry.
C. Application
D. Generalization
Questions:
1. What is a mathematical system in geometry?
2. Explain the importance of undefined terms in a mathematical system.
3. What is the difference between postulates and theorems?
4. Do you think Euclid’s Axioms is helpful in the study of geometry? How?
IV. Evaluation:
Answer Assessment in Module 1 pages 12 -13. It is a 15 item multiple choice.
V. Assignment
1. Read Quarter 3 Module 2 of Triangle Congurence
2. Answer the activities listed below:
a. Independent Assessment 1
b. Independent Assessment 2
c. Independent Assessment 3
d. Assessment
e. Additional Activity
Prepared:
Catherine A. Peralta
Teacher I
Noted:
Dolores P. Borja
Head Teacher VI
Approved:
Rosauro A. Villanueva, Ph.D.
School Principal IV