4 years ago

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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