1.

If AD/DB = 3/4 and AC = 15 cm, find AE.

Answer»

basic proportionality theorem.

If AD/DB = AE/EC

3/4 = AE/EC

EC/AE = 4/3

(EC/AE)+1 = (4/3)+1

(EC +AE)/AE = 7/3

AC/AE = 7/3

15/AE = 7/3

AE = 15×3/7

AE = 45/7

thanks



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