Question

formulas of maths 3rd standard

Answer 1

2×2+3÷1 is formula of 3rd standard

Answer 2

perimeter of rectangle:-2(l+b) where l is length and b is breadth
perimeter of square:-4a where a is the side
perimeter of triangle:- a+b+c where a ,b,c are the sides
area of rectangle:-lb
area of square:-a^2