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If DE║AC, what is the measure of length a? See the attached image!
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If DE║AC, what is the measure of length a?

See the attached image!

If DE║AC, what is the measure of length a? See the attached image!-example-1
User Alex Bush
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BD is half the length of AD ( 18 is half of 36)

BE would be half of EC

EC = 42, so BE would be 42/2 = 21

a = 21

User Neli
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