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Lecture 1: 3D Geometry Part -1


Lecture 2: 3D Geometry Part -2


Lecture 3: 3D Geometry Part -3

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Lecture 1: Practice Session Part- 1


Lecture 2: Practice Session Part- 2


Lecture 3: Practice Session Part- 3

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Published    16-Jan-2017      Bilingual

Three dimensional geometry is chapter-11 of class 12 and includes the following : Direction cosines/ratios of a line joining two points. Cartesian and vector equation of a line, coplanar and skew lines, shortest distance between two lines. Cartesian and vector equation of a plane. Angle between (i) two lines, (ii) two planes, (iii) a line and a plane. Distance of a point from a plane. This section is particularly made for the students of class 12 English medium students. For queries you can mail us at mail@studykhazana.com.

Puneet Dogra

Phone: 95********94 Email: pun********@gmail.com
Address: Institute:

About Us

Hello, I am Puneet Dogra faculty of Study Khazana. I am a very passionate teacher. I am going to change your experience of learning maths. My way of teaching will surely lead you to your desired scores or may be more.Moreover I will give some magical tips to make maths much easier for you.


My highest qualification is MSc. in Mathematics from DU.


I have experience of more than 5 years in teaching.




STUDY KHAZANA is an e-treasure of knowledge and education with one aim of upbringing the level of education all over the India. In the journey of more than 25 years with 150 centers across the India we discovered that many student are out of the reach of proper education due to poverty.

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