How to Create a Safe and Inclusive Learning Environment for LGBTQIA+ Students

Grade 8 Mathematics Module: Determining the Conditions under which Lines and Segments are Parallel or Perpendicular

This Self-Learning Module (SLM) is prepared so that you, our dear learners, can continue your studies and learn while at home. Activities, questions, directions, exercises, and discussions are carefully stated for you to understand each lesson.

Each SLM is composed of different parts. Each part shall guide you step-by-step as you discover and understand the lesson prepared for you.

Pre-tests are provided to measure your prior knowledge on lessons in each SLM. This will tell you if you need to proceed on completing this module or if you need to ask your facilitator or your teacher’s assistance for better understanding of the lesson. At the end of each module, you need to answer the post-test to self-check your learning. Answer keys are provided for each activity and test. We trust that you will be honest in using these.

Please use this module with care. Do not put unnecessary marks on any part of this SLM. Use a separate sheet of paper in answering the exercises and tests. And read the instructions carefully before performing each task.

This module was designed and written with you in mind. It is here to help you master the skills in determining the conditions under which lines and segments are parallel or perpendicular. You are provided with varied activities to process the knowledge and skills learned and to deepen and transfer your understanding of the lesson. The scope of this module enables you to use it in many different learning situations. The lesson is arranged to follow the standard sequence of the course. But the order in which you read them can be changed to correspond with the textbook you are now using.

This module contains:

  • Lesson 1- Determining the Conditions under which Lines and Segments are Parallel or Perpendicular.

After going through this module, you are expected to:

1. Identify the properties of parallel lines, perpendicular lines, and quadrilaterals;

2. prove the conditions under which lines and segments are parallel or perpendicular;

3. use the properties of parallel lines, perpendicular lines, and quadrilaterals to find the measures of angles and sides involving quadrilaterals; and

4. apply properties of parallel and perpendicular lines to real life situations.

Grade 8 Mathematics Quarter 4 Self-Learning Module: Determining the Conditions under which Lines and Segments are Parallel or Perpendicular

MATH8-Q4-MOD5

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