Median of a triangle divides it into two triangles of equal areas | Word Problems

http://www.learncbse.in/ncert-solutions-for-class-9-maths/

00:02 Q1. In Fig.9.23, E is any point o.n median AD of a Triangle ABC. Show that ar (ABE) = ar (ACE).

00:30 Defination of Median : A median of a triangle is a line segment that joins the vertex of a triangle to the midpoint of the opposite side

01:06 Apply Area of triangle formula:Area of a triangle is the product of its base and the corresponding altitude.

03:18 Apply Area Axiom:If a planar region formed by a figure T is made up of two non-overlapping planar regions formed by figures P and Q, then ar(T)= ar (P)+ ar(Q)

NCERT solutions for CBSE class 9 maths Areas of Parallelograms and Triangles

CBSE Class 9 maths solutions Areas of Parallelograms and Triangles

CBSE class 9 maths Areas of Parallelograms and Triangles

Area of a figure is a number (in some unit) associated with the part of the plane enclosed by that figure.

Two figures are called congruent, if they have the same shape and the same size.

In this video, we learn how to apply Congruency Rule to solve Problems on Areas of Parallelograms and Triangles. Use parallel lines concept and triangle congruence theorems to prove/solve problems on Areas of Parallelograms and Triangles.

Basic Concept:

Area of a parallelogram is the product of its base and the corresponding altitude.

Area of a triangle is half the product of its base and the corresponding altitude.

Two figures are said to be on the same base and between the same parallels, if they have a common base (side) and the vertices, (or the vertex) opposite to the common base of each figure lie on a line parallel to the base.

Paralleogram Theorem:

Triangles on the same base (or equal bases) and having equal areas lie between the same parallels.

A median of a triangle divides it into two triangles of equal areas.

Reference book for the above video is

National Council of Educational Research and Training (NCERT) Book for Class 9 Subject: Maths

This Video is also refers as CBSE Class 9 mathts NCERT Solutions Chapter 9 Areas of Parallelograms and Triangles

This video is suited for CBSE class 9 maths Areas of Parallelograms and Triangles.

Follow us:

On Twitter

https://twitter.com/cbseguesspapers

Linkedin

https://www.linkedin.com/profile/view?id=396397973&trk=nav_responsive_tab_profile

Pinterest

https://in.pinterest.com/LearnCBSE/

Facebook

https://www.facebook.com/cbseguesspapers

Youtube LearnCBSE.in

https://www.youtube.com/user/CBSEPapers

VImeo

https://vimeo.com/user37035365

Wordpress

https://cbselabs.wordpress.com/

Scoop it! LearnCBSE.in

http://www.scoop.it/u/learncbse

Blogger

http://rdsharmamathssolutions.blogspot.in/

LearnCBSE ASk

http://www.ask.com/answers/profile/54801961/learncbse?qsrc=3099

Reddit LearnCBSE.in

http://www.reddit.com/user/learncbse/

Imgur LearnCBSE.in

http://imgur.com/user/learncbse

4Shared LearnCBSE.in

http://www.4shared.com/account/home.jsp#dir=oUxg5yB0

Tumblr

https://www.tumblr.com/settings/blog/cbseguesspapers.

Scribd

https://www.scribd.com/learncbse

Slideshare

http://www.slideshare.net/LearnCBSE37

Free NCERT Solutions for 9th

https://www.udemy.com/ncert-solutions-for-class-9th-maths-term-2-sa2/?couponCode=gyanpub

Free NCERT solutions for 10th

https://www.udemy.com/ncert-solutions-for-class-10th-maths-term-2-sa2/?couponCode=gyanpub

Phani CBSE

https://plus.google.com/+phanicbse

Visit us

http://www.learncbse.in

Tagged under: GyanPub,ncert solutions,Free Online Maths Class,Maths,Free ncert solutions

Clip makes it super easy to turn any public video into a formative assessment activity in your classroom.

Add multiple choice quizzes, questions and browse hundreds of approved, video lesson ideas for Clip

Make YouTube one of your teaching aids - Works perfectly with lesson micro-teaching plans

1. Students enter a simple code

2. You play the video

3. The students comment

4. You review and reflect

* Whiteboard required for teacher-paced activities

With four apps, each designed around existing classroom activities, Spiral gives you the power to do formative assessment with anything you teach.

Quickfire

Carry out a quickfire formative assessment to see what the whole class is thinking

Discuss

Create interactive presentations to spark creativity in class

Team Up

Student teams can create and share collaborative presentations from linked devices

Clip

Turn any public video into a live chat with questions and quizzes

Tried out the canvas response option on @SpiralEducation & it's so awesome! Add text or drawings AND annotate an image! #R10tech

Using @SpiralEducation in class for math review. Student approved! Thumbs up! Thanks.

Absolutely amazing collaboration from year 10 today. 100% engagement and constant smiles from all #lovetsla #spiral

Students show better Interpersonal Writing skills than Speaking via @SpiralEducation Great #data #langchat folks!

Dr Ayla Göl
@iladylayla

A good tool for supporting active #learning.

The Team Up app is unlike anything I have ever seen. You left NOTHING out! So impressed!