Question

Find the length of AD.

Answer 1

............. .........................

Answer 2

AD = 4.5

Explanation:

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

`(BD)/(AD)` =
`(BE)/(EC)` , substitute values

`(3)/(AD )` =
`(8)/(12)` ( cross- multiply )

8AD = 36 ( divide both sides by 8 )

AD = 4.5