State whether the statements are true (T) or false (F).

Length of a side of an equilateral triangle and its perimeter vary inversely with each other.

False

Length of a side of an equilateral triangle and its perimeter vary directly with each other, e.g. let a be the side of an equilateral triangle. So, perimeter = 3 × (side) = 3× a = 3a. so, if we increase the length of side of the equilateral triangle, then their perimeter will also increase.