Welcome to Clip from Spiral logo

Interactive video lesson plan for: Circles Theorems and Defination | Chord and chords of a Circle Properties | CBSE Class 9

Activity overview:

Circles Theorems and Defination | Chord and chords of a Circle Properties | CBSE Class 9
http://www.learncbse.in/ncert-solutions-for-class-9-maths/
00:02 CBSE solutions for class 9 maths circles Q1. Fill in the blanks:
(i) The centre of a circle lies in of the circle. (exterior/ interior)
00:29 Regions of Circle.(Exterior region and Interior region).
00:50 (ii) A point, whose distance from the centre of a circle is greater than its radius lies in of the circle. (exterior/ interior)
01:50 (iii) The longest chord of a circle is a of the circle.
01:59 Defination Diameter of a circle.
02:40 (iv) An arc is a when its ends are the ends of a diameter.
03:00 Defination of Semi-circle.
03:16 (v) Segment of a circle is the region between an arc and of the circle.
03:30 (vi) A circle divides the plane, on which it lies, in parts.
03:59 Q2. Write True or False: Give reasons for your answers.
(i) Line segment joining the centre to any point on the circle is a radius of the circle.
04:30 (ii) A circle has only finite number of equal chords.
05:05 (iii) If a circle is divided into three equal arcs, each is a major arc.
05:10 Major Arc & Minor Arc
05:48 (iv) A chord of a circle, which is twice as long as its radius, is a diameter of the circle.
05:59 Defination of Chord , Diameter .
06:10 (v) Sector is the region between the chord and its corresponding arc.
06:18 Defination of Sector , Segment.
06:55 (vi) A circle is a plane figure.
Angle Subtended by a Chord at a Point
07: 13 Q1. Recall that two circles are congruent if they have the same radii. Prove that equal
chords of congruent circles subtend equal angles at their centres.
09:04 By using S.S.S rule of Congruency
09:09 Apply CPCT (Corresponding Parts of Congruent Triangles)

09:34 CBSE class 10 maths chapter 10 Circles Q2. Prove that if chords of congruent circles subtend equal angles at their centres, then
the chords are equal.
11:11 Apply S.S.S rule of Congruency

There is one and only one circle passing through three given non-collinear points.

11:41 CBSE Class 9 maths solutions Circles Q1. Draw different pairs of circles. How many points does each pair have in common?
What is the maximum number of common points
12:09 Pair of Circles with no point of intersection in common.
12:25 Pair of Circles with one point of intersection in common.
12:45 Pair of Circles with two points of intersection in common.
13:15 Conclusion
13:30 CBSE class 10 maths chapter 10 Circles Q3. If two circles intersect at two points, prove that their centres lie on the perpendicular bisector of the common chord.
15:30 Apply S.S.S rule of Congruency
15:50 Apply CPCT (Corresponding Parts of Congruent Triangles)
16:53 Apply S.A.S rule of Congruency
17:06 Apply CPCT
17:30 Using Linear Pair

Equal Chords and Their Distances from the Centre

The length of the perpendicular from a point to a line is the distance of the line from the point .
Equal chords of a circle ( or of congruent circles) are equidistant from the centre(or centres).
Chords equidistant from the centre of a circle are equal in length.

18:40 CBSE class 10 maths chapter 10 Circles Q1. Two circles of radii 5 cm and 3 cm intersect at two points and the distance between their centres is 4 cm. Find the length of the common chord.
20:33 Using Theorem:If two circles intersect at two points, prove that their centres lie on the perpendicular bisector of the common chord.
21:13 CBSE class 10 maths chapter 10 Circles Q2. If two equal chords of a circle intersect within the circle, prove that the segments of one chord are equal to corresponding segments of the other chord.
22:00 Construction to solve the theorem.
23:13 Apply R.H.S rule of Congruency
26:39 CBSE class 10 maths chapter 10 Circles Q3. If two equal chords of a circle intersect within the circle, prove that the line joining the point of intersection to the centre makes equal angles with the chords.
28:52 Equal chords of a circle ( or of congruent circles) are equidistant from the centre(or centres)
Q4 If a line intersects two concentric circles (circles with the same centre) with centre O at A, B, C and D, prove that AB = CD (see Fig. 10.25).
31:15 The line drawn through the centre of a circle to bisect a chord is perpendicular to the chord.
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

learncbse.in
CBSE solutions for class 9 maths circles
CBSE class 10 maths chapter 10 Circles
Solutions for CBSE Class 9 Maths Chapter 10
circles CBSE Class 9 Maths,
CBSE Class 10 Maths Solutions Circles
NCERT solutions for class 9 maths circles
NCERT solutions for CBSE class 9 maths circles
CBSE Class 9 maths solutions Circles

Tagged under: GyanPub,ncert solutions,Free Online Maths Class,Maths,Free ncert solutions,CBSE solutions class 9 maths circles,CBSE class 10 maths chapter 10 Circles Ex 10.2,Solutions CBSE Class 9 Maths Chapter 10,NCERT solutions class 9 maths circles,NCERT solutions CBSE class 9 maths circles,CBSE Class 9 maths solutions Circles Ex10.1

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

Share on:

Share Circles Theorems and Defination | Chord and chords of a Circle Properties | CBSE Class 9 on Google+ Share Circles Theorems and Defination | Chord and chords of a Circle Properties | CBSE Class 9 on Twitter Share Circles Theorems and Defination | Chord and chords of a Circle Properties | CBSE Class 9 on Facebook Pin Circles Theorems and Defination | Chord and chords of a Circle Properties | CBSE Class 9 Email Circles Theorems and Defination | Chord and chords of a Circle Properties | CBSE Class 9

Ready to see what else Spiral logo can 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

Spiral
Review of Spiral by teacher: Kathryn Laster @kklaster

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

Spiral
Review of Spiral by teacher: Room 220 Math Stars @3rdgradeBCE

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

Spiral
Review of Spiral by teacher: Miss Ord @ordmiss

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

Spiral
Review of Spiral by teacher: Adam J. Stryker @strykerstennis

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

Spiral
Review of Spiral by teacher: Dr Ayla Göl @iladylayla

A good tool for supporting active #learning.

Spiral
Review of Spiral by teacher: Brett Erenberg @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