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Lady bird [3.3K]
4 years ago
10

Find the length of AD.

Mathematics
2 answers:
Sophie [7]4 years ago
7 0

Answer:

AD = 4.5

Step-by-step explanation:

Since DE is parallel to AC and intersects 2 sides of the triangle it divides those sides in proportion, that is

\frac{BD}{AD} = \frac{BE}{EC} , substitute values

\frac{3}{AD } = \frac{8}{12} ( cross- multiply )

8AD = 36 ( divide both sides by 8 )

AD = 4.5

san4es73 [151]4 years ago
6 0
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