the perimeter of an equilateral triangle is 45.if one of the side is the side of an isoceles triangle of perimeter 40 then what is the lenght of base of isoceles triangle. Pick.
A) 10 units	B) 20 units	C) 30 units	D) 40 units	E) 15 units

Rationale: "base of isoceles triangle is 40 - 15 - 15 = 10 units . answer : a"
Answer: A