in triangle ABC,DE parallel toBC. if AD=5cm,BD=7cm,AC=18cm,find the lenght of AE?
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Step-by-step explanation:
Given: In a triangle ABC,DE//BC
AD = 5 cm
BD = 7 cm
AC = 18 cm
AE = ?
DE//BC
Triangle ADE is similar to triangle ABC
AD/AB = AE/AC
AB = AD+BD
AB = 5 + 7
AB = 12
5/12=AE/18
AE = 5 × 18/12
AE = 7.5 cm
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