Why would conducting trade by both caravans and ships be lucrative for the arab empire?

the right answer for the question that is being asked and shown above is that: "their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.  " the  participant in european imperialism is being described below is that  their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful. 

6 units. ab and lo are congruent sides, and if ab= 6 units, then lo would be the same.