Answer:
12 units
Step-by-step explanation:
Given that the trapezium has base 1 = 6, height = 2 and area = 18
Formula for area of a trapezium
=1/2 h(b1+b2),
where h = height of trapezium
b1 = base length of one parallel side
b2 = base length of second parallel side
Of these we know everything except b2.
Substitute for known values
18=1/2 (2)(6+b2)
b2 =12
Thus second base for the trapezium is 12 units.