Line 18: |
Line 18: |
| | | |
| ==Reference Books== | | ==Reference Books== |
| + | * Please download 9th standard mathematics textbook from the following link and refer the page 89. |
| + | [[http://www.textbooksonline.tn.nic.in/Std9.htm]] |
| | | |
| = Teaching Outlines = | | = Teaching Outlines = |