∵∠BAD=20°,AB=9,∴BD=AB?tan20°=9×0.3640=3.276(m),∵BC=0.5,∴CD=BD-BC=3.276-0.5=2.776(m),在Rt△CDE中,∠DCE=∠A=20°,∴CE=CD?cos∠CDE=CD?cos20°=2.776×0.9397≈2.6(m).答:CE的长约为2.6m.