Lesson 8. Triangles I | Maths Session for Grade 10 #DPEducation #Grade10Maths #triangles

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Lesson 8. Triangles
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Part 01

1.1 Interior and exterior angles⏩00:00:00
1.2 Theorem 1⏩00:11:53
1.3 Exercises⏩00:23:32
1.4 Theorem 2⏩00:56:31
1.5 Exercises⏩01:06:55

Part 02

About DP Education
The DP education was born out of the passion of Mr. Dhammika Perera to provide an innovative online math learning platform for school students to enhance their math skills. School students can access the government math curriculum from grades 6-13 at their own convenience for free.

DP Education (in English)
Students who wish to learn Math can watch the video and learn the subject at their convenience. Here math is taught in an easy way and in simple language.
You can also watch and learn math in Sinhala and Tamil languages by clicking to the links below.

CHAPTER DESCRIPTION (in this video)

This video is a lesson on Triangles I - Grade 10. By studying this lesson you will be able to
• prove riders using the theorems related to the angles of a triangle.

Maths can not be learnt if you leave in between the class. So, we have provided break in between our online class at regular intervals.

You can ask your doubts and any questions related to this chapter in the message section below, and our teacher will reply back at the earliest. Also, do attend our live QnA Sessions, which are conducted from time to time, and we post the announcement on our social media platforms.

The link is given below:-

You can also visit Mr. Dhamikka Perera's Youtube channel to know more about his vision on DP Education and the initiative at

For our graduate, postgraduate and upskilling students, we also provide a large number of free courses from various prestigious universities across the world through our website:

Our Motto is """"Learn what you love"""" and we will work hard to make learning enjoyable for you.

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