The radius of the circle O is 2. The chord AB is equal to the chord CD. Both of the distance from the 2 chords to point O are 1. The area range of the quadrilateral ABCD is ___.(英汉小词典:radius半径;chord弦;quadrilateral四边形)

A.(英汉小词典:radius半径;chord弦;quadrilateral四边形)

【参考答案】

参考(3√3,4√3]