3d Geometry Class 11| CBSE Maths 3 Dimensional Geometry

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Roshni Mukherjee, the Founder-Educator at LearnoHub has been building this free learning platform since 2011. She has been recognized as one of the 100 Women Achievers of India by the Ministry of Women & Child Development and felicitated by the President of India in 2016. Roshni has been invited by Google to speak at Global Education Symposium 2017 held at Google Headquarters, California. Limca Book of Records also recognized our work.

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In this video, we are going to cover the following topics:-What is 3D Geometry ,3D Space-Coordinate plane in 3D space-Octants coordinate table-15.13 Ex 1: Find the octant in which the points (4, 2, -5) and (-4, 2, -5) lie-17.33 Ex 2: A point is on the x-axis. What are its y-coordinate and z-coordinate?-19.18 Ex 3: A point is in tne XZ-plane. WHat can you say about its y-coordinate? -DIstance Formula-22.05 Ex: Find the distance between the points (-3, 7, 2) and (2, 4, -1) -23.06 Q.1: Show that the points P(-2, 3, 5), Q(1, 2, 3) and R(7, 0, -1) are collinear. -26.39 Q.2: Verify that (0, 7, -10), (1, 6, -6) and (4, 9, -6) are the vertices of an isosceles triangle. -Section formula-Internal-Internal Vs External division of a line segment-Section formula-External-33.54 Q.1: Find the coordinates of the point which divides the line segment joining the points (-2, 3, 5) and (1, -4, 6) in the ratio (i) 2 : 3 internally (ii) 2 : 3 externally.-34.57 Q.2 Find the ratio in which the YZ-plane divides the line segment formed by joining the points (-2, 4, 7) and (3, -5, 8).

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[entertainmentarenaks]

★Timestamps→
5:21 Co-ordinate Plane in 3D Space
8:37 Octants Co-ordinate Table
15:11 Questions
20:55 Distance Formula
22:03 Questions
29:11 Section Formula ( Internal )
30:52 Internal Vs External Division of Line Segment
33:02 Section Formula ( External )
33:52 Questions

[GLDN]

22:00 Distance formulae
30:17 INTERNALLY
33:45 EXTERNALLY

[gurvendarchauhan]

This videos is 6 months old but legend see know when annul comes😂🖒

[anushkaagarwal]

Tommorow is my maths final exam and i am watching this video today😂
But honestly this is very helpful
So, thank you mam to make our problems easy❤️✌🏻

[Adriii]

Wathching this 4 yrs older video before 30 min of my exam and everything is crystal clear ❤🌼😇

[BD-dnlf]

I gave my exams learning from one shot series and i was able to crack all the questions with ease . Thank you ma'am .

[sudhababu]

There is one way of remembering the signs of the octant.... Starting from 1-4 octant the x -y axis are same that of 5-8 octant... Now looking at the z-axis the first four octant are positive i.e ( first floor) and from 5-8 are negative (ground floor) . Instead of remebering the diagram, TRY THIS METHOD.. 😁😁✌

[kruti]

The best thing at which I am surprised is how the full concept gets cleared in one video a lot mam for saving my class 11 I shared it to my frnds..so that they also get benefitted.. ..Again thanks mam from my core of my Plz help us like this in our class 12 also🙏

[Kira-vldi]

It was 3 years old video and legends are watching it now, before exam 23:03 😅

[Anshitiwari]

0:00 intro
Basics about 3D and sign convention
15:13 Examples
21:00 Distance Formula
22:05 Examples on Distance Formula
23:06 Question on DF
29:10 Section Formula Internally
30:40 Externally
33:55 question

[sehajkaur]

gr8 mam, u are a blessing to every maths student.

[gs.y]

U r the best maths teacher ❤️ I can't explain by words how much happy I m by seeing your video 😁🌺🌸✨🌼🌹🙂🎉

[vishnugupta]

Time stamp -
Intro - 1:30
Coordinate- 5:50
- Q1 - 15:15
-Q2 - 18:30
-Q3 - 20:44
Distance formula - 21:00
Q1-20:05
Q2-26:40
Section formula - 29:15
Q1- 33:57
Q2- 35:35

[akshatswami]

" Concept hua crystal clear "

[prachisodhiya]

Roshini ma'am..when you teach us..every single topic of the chapter seems easy..thank you for this easy and fun learning way..
Always feel grateful to have a teacher like this...Thank you 😊😊💕💕✨✨

[sudhanshukumar]

online school classes are frustating but this online tutor had made it fantastic....with her lots of hardwork may ur channel grow as fast as it can and i know it will because it has power of an effective women like you....

[Realfunpro]

Any legend here seeing this video after 4 year Like me😢😂😂😂

[TheAjaywives]

Completing all the concepts of the chapter in best way and in minimum time is really amazing.
Keep up the hard work.

[hitmebeatz]

Saw at 11 pm
Exam tomorrow
Wish luck

[sudhanshukumar]

1 hr before: kaise padhunga 3d Geometry itna complex lg rha hai:
now: arei ye to halwa chapter hai....