Dear students ,
this DAV Managing Committee prescribed marking scheme will help you to decide which chapter should be given more stress to while preparing for DAV board exam
http://www.freemindshare.com/map/N5YlMTGjQZ/
Wednesday, December 5, 2007
Circumference and Area of Circle
Dear students,
A bird view of circumference and area of circles
http://www.freemindshare.com/map/abp3AMNOTV/
A bird view of circumference and area of circles
http://www.freemindshare.com/map/abp3AMNOTV/
Tuesday, May 29, 2007
Monday, May 14, 2007
This space is for those who are fascinated by MATHS ,try their hands on it but end up getting confused because of non-clarity of concepts.
The chapter i am going to start with is CIRCUMFERENCE AND AREA OF CIRCLES.....
Prerequisite knowledge : Take a fixed point on the plane and mark it as O . Take a fixed distance mark it as 'R' . Keeping the end at O fixed and moving the other end of 'R' , the figure thus obtained is a circle .
All the points of this figure are at equal distance from O .(all the points in colour blue)
O-is called the centre of the circle .
R-is the radius of the circle .
Circles around us: Bangle , Rim of a cellotape .
Rim of a wheel.
Circumference (or perimeter) of the circle:is the measure of the boundary of the circle.
Lets do an activity to find circumference of certain circular figures....
The chapter i am going to start with is CIRCUMFERENCE AND AREA OF CIRCLES.....
Prerequisite knowledge : Take a fixed point on the plane and mark it as O . Take a fixed distance mark it as 'R' . Keeping the end at O fixed and moving the other end of 'R' , the figure thus obtained is a circle .
All the points of this figure are at equal distance from O .(all the points in colour blue)
O-is called the centre of the circle .
R-is the radius of the circle .
Circles around us: Bangle , Rim of a cellotape .
Rim of a wheel.
Circumference (or perimeter) of the circle:is the measure of the boundary of the circle.
Lets do an activity to find circumference of certain circular figures....
- Bangle:mark a point at the boundary of the bangle . Take a thread and start wrapping it around the boundary starting from the marked point . Continue till you reach the marked point again , cut out the wrapped up piece of thread .
Measure this length of the thread using a ruler.
This length of the thread wich measures the boundary of the bangle is the circumference of the given bangle.
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