Std 10 Chapter 1 part 01 - http://resource.itschool.gov.in/maths-web-new/10/10_01_01.html Std 10 Chapter 1 part 02 - http://resource.itschool.gov.in/maths-web-new/10/10_01_02.html Std 10 Chapter 1 part 03 - http://resource.itschool.gov.in/maths-web-new/10/10_01_03.html Std 10 Chapter 1 part 03 - http://resource.itschool.gov.in/maths-web-new/10/10_01_03.html Std 10 Chapter 1 part 04 - http://resource.itschool.gov.in/maths-web-new/10/10_01_04.html Std 10 Chapter 1 part 05 - http://resource.itschool.gov.in/maths-web-new/10/10_01_05.html