How Do You Prove Two Triangles Are Similar?

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SUMMARY

This discussion centers on proving the similarity of two triangles based on their geometric properties. The key insight is that both triangles share a common height, denoted as 'h', which is critical for establishing similarity. The variable 'x' represents an unknown that must be expressed in terms of 'h' to facilitate the proof. Ultimately, the participant successfully solved the problem by recognizing the relationship between the triangles.

PREREQUISITES
  • Understanding of triangle similarity criteria
  • Basic knowledge of geometric properties and relationships
  • Familiarity with algebraic manipulation of variables
  • Concept of height in triangles
NEXT STEPS
  • Study the criteria for triangle similarity, including AA, SSS, and SAS
  • Explore geometric proofs involving heights and bases of triangles
  • Learn about the properties of similar triangles in coordinate geometry
  • Practice solving problems involving unknowns in geometric contexts
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Students studying geometry, educators teaching triangle properties, and anyone interested in mastering geometric proofs and relationships.

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Homework Statement
From P the angle of elevation to the top of Pole B is 30 degrees. Find h, the height of the two poles.
Relevant Equations
Unsure
I have tried multiple methods to solve this but have been unsuccessful at every attempt.

The apparent correct answer is:
 

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Can you show that the two triangles are similar?
 
As I understand the problem, the heights of the two poles are both h. x is an unknown that you need to solve for in terms of h. That should then be of some help to you.
 
hutchphd said:
Can you show that the two triangles are similar?
Yes
 
hutchphd said:
Can you show that the two triangles are similar?
Thanks I solved it. Heh it missed my eye.
 
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