CAN SUM1 HELP ME WITH THIS, LIKE I REALLY REALLY NEED HELP

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.

In the given triangle, ∠aed ∼ ∠ abc, ad = 6.9, ae = 7.2, de = 5.2, and bc = 10.2. find the measure of bd and ce. round your answer to the nearest tenth.