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  1. youtube.com
    https://m.youtube.com/watch?v=X7yb_zwidd0

    පාඩම 1 - පරිමිතිය | ගණිත සැසිය සඳහා 10 …

  2. youtube.com
    https://m.youtube.com/watch?v=nPSwALQL7dc

    Maths - Grade 10 - 1 st lesson -පරිමිතිය - perimeter - YouTube

  3. moe.gov.lk
    https://www.e-thaksalawa.moe.gov.lk/Si/Si-grade10.php

    මුල් පිටුව - e-තක්සලාව

  4. pastpapers.wiki
    https://pastpapers.wiki/grade-10-mathematics-part-i-textbook...

    Grade 10 Mathematics Part I textbook | Sinhala Medium – New Syllabus

  5. govdoc.lk
    https://govdoc.lk/grade-10-mathematics-text-book

    Grade 10 Mathematics Text Book - Sri Lanka Government …

  6. pastpapers.wiki
    https://pastpapers.wiki/grade-10-mathematics-workbook-with-unit...

    Grade 10 Mathematics Workbook with Unit Test Papers(Sinhala Medium)

  7. youtube.com
    https://m.youtube.com/watch?v=GwcxX4nvoaQ

    O/L Maths Lessons in Sinhala - Perimeter | Grade 10 Lesson 1

  8. teachmeonline.net
    https://teachmeonline.net/course/10-ශ්රේණිය...

    Grade 10 - Mathematics - First Term - Text Book Video Lessons [Sinhala …

  9. apegananpanthiya.lk
    https://www.apegananpanthiya.lk/lessons/grade-10/index.html

    Grade 10 Perimeter | 10 ශ්‍රේණිය පරිමිතිය

  10. pastpapers.wiki
    https://pastpapers.wiki/grade-10-mathematics-unit-01-perimeter...

    Grade 10 Mathematics Unit 01 | Perimeter Questions and Answers