▱ the circumference of ABCD is 36 & nbsp; cm, ab = 57bc, then the length of the longer side is () A. 15cmB. 7.5cmC. 21cmD. 10.5cm

▱ the circumference of ABCD is 36 & nbsp; cm, ab = 57bc, then the length of the longer side is () A. 15cmB. 7.5cmC. 21cmD. 10.5cm


The perimeter of ∫ ABCD, ▱ ABCD = 2 (AB + BC) = 36, ∫ AB + BC = 18, ∫ AB = 57bc, ∫ BC = 10.5