Surfaces and Curves


Basic Geometrical Ideas I - Concepts
Class - 6th CBSE Subjects
 
 
Concept Explanation
 

Surfaces and Curves

Surfaces and Curves: Anything which is not straight is called a curve.

1. Simple Curve – A curve that does not cross itself.Simple Curve

2. Open Curve – Curve in which its endpoints do not meet.

Open Curve
3. Closed Curve – Curve that does not have an endpoint and is an enclosed figure.Closed Curve

A closed curve has 3 parts which are as follows:

  • Interior of the curve: It refers to the inside/inner area of the curve.
  • The exterior of the curve: It refers to the outside / outer area of the curve.
  • The boundary of the curve: It refers to the dividing line thus it divides the interior and exterior of the curve.
  • Sample Questions
    (More Questions for each concept available in Login)
    Question : 1

    All Polygons are ______________ curves. 

    Right Option : A
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    Question : 2

    In the given figure which point lies in interior part of the curve.

    Right Option : B
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    Explanation
    Question : 3

    In the given figure which point lies in boundary part of the curve.

    Right Option : D
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    Explanation
     
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