All Important Mathematics Formulae of Mathematics (Class IX)

I compiled all important formulae of Mathematics for the students of grade 9th.

I took these formulae from "Mathematics for Class IX" published by Sindh Textbook Board, Jamshoro. This collection would be useful for the students of Board of Secondary Education Karachi (BSEK), Board of Intermediate and Secondary Education Hyderabad (BISE Hyderabad),  Board of Intermediate and Secondary Education Larkana (BISE Larkana), Board of Intermediate and Secondary Education Sukkur (BISE Sukkar) and Board of Intermediate and Secondary Education Sukkur (BISE Mirpurkhas)