# Interactive video lesson plan for: Circles Theorem| Chords of congruent circles subtend equal angles

#### Activity overview:

Circles Theorem| Chords of congruent circles subtend equal angles
http://www.learncbse.in/ncert-solutions-for-class-9-maths/
00:02 Circles Theorem:Prove that if chords of congruent circles subtend equal angles at their centres, then the chords are equal.
01:11 Two circles are congruent if they have the same radii
01:37 Apply S.S.S rule of Congruency
01:58 Apply CPCT (Corresponding Parts of Congruent Triangles)

Follow us on Google Plus:
https://plus.google.com/+phanicbse
Like us on Facebook:
https://www.facebook.com/ncertsolutionsbooks
Follow us on twitter
https://www.twitter.com/gyanpub

In this video, students learn aplication of Circles theorems (Several Theorems) and sample problems relating circles and associated angles.
Circles theorem 1. A circle is the collection of all points in a plane, which are equidistant from a fixed point in the plane.
Circles theorem 3. If the angles subtended by two chords of a circle (or of congruent circles) at the centre(corresponding centres) are equal, the chords are equal.
Circles theorem 7. Equal chords of a circle (or of congruent circles) are equidistant from the centre (or corresponding centres).
Circles theorem8. Chords equidistant from the centre (or corresponding centres) of a circle (or of congruent circles) are equal.
Circles theorem 9. If two arcs of a circle are congruent, then their corresponding chords are equal and conversely if two chords of a circle are equal, then their corresponding arcs (minor, major) are congruent.
Circles theorem 10. Congruent arcs of a circle subtend equal angles at the centre.

For more Videos Visit
https://www.youtube.com/user/CBSEPapers/videos
https://www.youtube.com/user/CBSEPapers

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 10 Circles Ex 10.4

Tagged under: GyanPub,ncert solutions,Free Online Maths Class,Maths,Free ncert solutions,Circles theorem,Chords,NCERT,CBSE Class 9 mathts NCERT Solutions,CBSE Class 9 mathts NCERT Solutions Chapter 10 Circles

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

Play this activity

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

## Ready to see what elsecan do?

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

### 1000s of teachers use Spiral to deliver awesome, engaging activities that capture students' understanding during lessons.

Now it's your turn Sign up

### Spiral Reviews by Teachers and Digital Learning Coaches

@kklaster

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

@3rdgradeBCE

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

@ordmiss

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

@strykerstennis

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

@iladylayla

A good tool for supporting active #learning.

@BrettErenberg

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

## Get the Clip Chrome Extension & Create Video Lessons in Seconds

Add Clip to Chrome