Chords ab and cd intersect at point e, ae = 10, eb = 4, and ce = 8. therefore, ed =
i give medals

So here is how we are going to find out what is ED. 
Based on the given figure, it states that, AE is 10, and EB is 4 and CE is 8.
So, (AE/CE)=(ED/EB)
10/8 = ED/4 <<multiply both sides by the common denominator which is 8 and the result would be:
80/8 = 8ED/4
10 = 2ED <<divide both sides by 2 and we get
ED = 5.
Therefore, the measurement of ED is 5. 
Hope this answer helps. Let me know if you need more help next time!

5

Step-by-step explanation:

5 is correct, since (CE)(ED) = (AE)(EB).