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The Circle By Ranjana

The Circle By Ranjana. O. A. CIRCLE. Eg. ball,bangle,lemon.coin. CENTRE. O. A. B. RADIUS. CENTRE : O RADIUS : OA. . O. In a plane,each point of the circle is at equal distance from a fixed point.The fixed point is called the centre of the circle. CENTRE = O. Radius. O. A.

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The Circle By Ranjana

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  1. The Circle By Ranjana

  2. O A CIRCLE Eg. ball,bangle,lemon.coin

  3. CENTRE O A B RADIUS CENTRE : O RADIUS : OA

  4. . O In a plane,each point of the circle is at equal distance from a fixed point.The fixed point is called the centre of the circle. CENTRE = O

  5. Radius O A The distance from centre to any point on the circle is called radius of the circle. RADIUS = OA

  6. A DI AMETER . O B A Line segment passing through the centre of the circle and whose end points lie on the circle is called the diameter of the circle. DIAMETER = AB

  7. CIRCUMFERENCE . O The length of the circle or the distance around it is called circumference of the circle.

  8. . O A B A Line segment whose both the ends touches the circumference and passes through the centre is called diameter. DIAMETER : AB

  9. Relation between radius and diameter RADIUS = DIAMETER 2 . O A B OB = AB 2

  10. Eg. If diameter of the circle is 10 cm then find its radius? Sol. Radius =diameter / 2 radius=10 cm/ 2 radius =5 cm . O A B Diameter =10cm

  11. Eg. If radius of the circle is 6 cm,then find the diameter of the circle? Sol. Diameter = 2 x Radius Diameter = 2 x 6cm Diameter = 12 cm . Radius = 6cm A O

  12. RELATION BETWEEN CIRCUMFERENCE AND DIAMETER CIRCUMFERENCE = 3 x DIAMETER(APPROX) CIRCUMFERENCE . O B A DIAMETER

  13. Eg. Find the circumference (approx) of the circle whose diameter is 10cm. Sol. Circumference = 3 x diameter(approx) Circumference = 3 x 10 cm Circumference = 30 cm CIRCUMFERENCE . O B A DIAMETER=10 CM

  14. EVALUATION 1. what is the relation between radius and diameter of the circle? Sol .Radius=diameter/2 2. What is the relation between circumference and diameter of the circle? Sol. Circumference=3Xdiameter(approx) . 3. In this figure O radius OA or OB is ______. A B diameter AB is ________. centre O is _________.

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