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00:00 - 00:59 | 11th question is which of the following are closed curves which of them are simple so in this question we have given some figures and we have to identify vichar closed curves and which of them are simple now as we know closed curves are those cars which repeat itself at some point for example suppose this is a figure now we can see that we had started from this point and also we had ended at this point so this curve had repeated itself at this point so this is a closed curve and simple curves are those creatures not repeat itself at any point for example this is a simple curve cause it starts from this and ended this therefore it does not repeat itself at any point the this is a simple curve now let's see |

01:00 - 01:59 | the following parts so first part is it is a straight line so it days a simple curve it is not a closed curve I because it starts from this sentence from here so it is not repeat itself s the triangle this is a closed curve Y because it's repeat itself suppose if you start from here so it repeat itself our next we have a hexagon which is closed figure close cover curve because it does repeat itself at any point now the next Trigger it is also a closed curve because it does repeat itself at any point now next figure is a simple curve Y because it does not |

02:00 - 02:59 | it at any point it starts from here and ends hair which is both are different point and next we have the close kaarvayi because it starts from here and share also it does cross itself so this is a closed next we have is a closed kar why because it does cross itself at this point so these are the answer thank you |

**Introduction**

**The size of a line segment is its length.**

**Units of measurement of length.**

**Closed curve a curve having the same beginning and ending point is called a closed curve.**

**Simple curve a curve is a simple curve if it does not cross itself.**

**Simple closed curve a curve having the same beginning and ending point and which does not cross itself is called a simple closed curve.**

**Interior region the portion of the plane inside the curve or bounded by the curve is called the interior region.**

**Exterior region the portion of the plane outside the curve is called the exterior region.**

**Regions**

**Perimeter the length of the boundary of a closed figure is known as its perimeter.**