- Data Structure
- Networking
- RDBMS
- Operating System
- Java
- MS Excel
- iOS
- HTML
- CSS
- Android
- Python
- C Programming
- C++
- C#
- MongoDB
- MySQL
- Javascript
- PHP
- Physics
- Chemistry
- Biology
- Mathematics
- English
- Economics
- Psychology
- Social Studies
- Fashion Studies
- Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
In figure below, if $ \angle 1=\angle 2 $ and $ \triangle \mathrm{NSQ} \cong \triangle \mathrm{MTR} $, then prove that $ \triangle \mathrm{PTS} \sim \triangle \mathrm{PRQ} . $
"
Given:
\( \angle 1=\angle 2 \) and \( \triangle \mathrm{NSQ} \cong \triangle \mathrm{MTR} \)
To do:
We have to prove that \( \triangle \mathrm{PTS} \sim \triangle \mathrm{PRQ} . \)
Solution:
$\triangle NSQ \cong \triangle$ MTR$
This implies,
$SQ = TR$......….(i)
\( \angle 1=\angle 2 \)
This implies,
$PT = PS$.......….(ii) (Sides opposite to equal angles are equal)
From (i) and (ii),
$\frac{PS}{SQ} = \frac{PT}{TR}$
Therefore, by converse of basic proportionality theorem,
$ST \| QR$
This implies,
$\angle 1 = PQR$
$\angle 2 = \angle PRQ$
In $\triangle PTS$ and $\triangle PRQ$
$\angle P = \angle P$ (Common)
$\angle 1 = \angle PQR$
$\angle 2 = \angle PRQ$
Therefore, by AAA similarity,
$\triangle PTS \sim \triangle PRQ$
Hence proved.
To Continue Learning Please Login
Login with Google