**Known values:**

Measured distances ** AB = x** and

**.**

*BC = y*Vertical angles ** α**,

**,**

*β***measured at A, B and C respectively.**

*θ***Solution:** Height of object ** h**.

From vertical triangles ADE, BDE and CDE:

Solving triangles ADB and ADC by the cosine rule:

In triangle ADB,

Same for triangle ADC,

Therefore:

And:

** **