Changes

The first step is to understand how to define circles and related terms using geometric vocabulary. The next step is to understand what is Pi. That it is a constant and that for any circle the ratio of the circumference by the diameter is always a constant value Pi. The interesting properties of Pi – an irrational number can also be discussed here in the basic form. Ability for the child to do simple area and perimeter calculations. Next the learner should understand that the circle is a 2 dimensional plane figure and how to visualise solid 3-dimensional figures. What are the solid shapes that have a circle as a part of them. Mensuration – more complex area measurements which include circular shapes. Surface Area and Volume measurement of sold shapes such as cylinder, sphere and cone. Understand the properties of the circles by proving theorems deductively. Also acquire the skills of deductive proofs, understand that all the properties can be deduced from the axioms. Understand the relationship between lines and circles – secant and tangent

Starting from the primary class, the students are exposed to circles with examples to the class 12th analytic treatment of the same.

The pages here are dsigned to acquiant the teacher with basic definitions of circles from the 9th class to 10 standard.

==Concept #1 CIRCLE==

==Concept #1 CIRCLE==

===Learning objectives===

===Learning objectives===

===Notes for teachers===

===Notes for teachers===

'''''Definition:A circle is a collection of all points in a plane, which are equidistant from a fixed point.'''''

'''''Definition:A circle is a collection of all points in a plane, which are equidistant from a fixed point.'''''