Question

What is the value of Y? (Type number only)
​

Answer 1

h = 2.7 m

Explanation:

Assuming you mean to find h

Δ ACB and Δ AED are similar triangles ( by the AA postulate )

Then the ratios of corresponding sides are in proportion , that is

`(ED)/(CB)` =
`(AD)/(AB)` ( substitute values )

`(h)/(0.9)` =
`(6+12)/(6)` =
`(18)/(6)` = 3 ( multiply both sides by 0.9 )

h = 0.9 × 3 = 2.7 m