Figure I and II are similar quadrilaterals.
Which proportion must be true?
A. 6/6.4 = 8/5
B. 2/3.2 = b/a
C. 3.2/2 = a/8
D. a/b = 8/2
a = (3.2 * 8)/2 = 12.8
3.2 / 2 = 1.6
12.8 / 8 = 1.6
