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CIRCLES

BY. CIRCLES. ANITA. Closed curves. Simple Closed Curves. Simple closed curves made of line segments. WHAT IS A CIRCLE ?. A CIRCLE IS A LOCUS OF A POINT WHICH ARE EQUIDISTANT FROM THE FIXED POINT. CONSTRUCTION OF A CIRCLE. APPLICATION. Medal. CIRCULAR SHAPED OBJECTS. Tube. Key hole.

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CIRCLES

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  1. BY CIRCLES ANITA

  2. Closed curves Simple Closed Curves Simple closed curves made of line segments

  3. WHAT IS A CIRCLE ? . . . A CIRCLE IS A LOCUS OF A POINT WHICH ARE EQUIDISTANT FROM THE FIXED POINT . . . . . . . . .

  4. CONSTRUCTION OF A CIRCLE

  5. APPLICATION Medal CIRCULAR SHAPED OBJECTS Tube Key hole Top Plate Ring Coins Clock

  6. PATTERNS IN CIRCLES TOOTHED WHEEL GRINDING WHEEL FAN PATTERN OF A CIRCLE COLOUR WHEEL DESIGNED WHEEL

  7. ELEMENTS OF A CIRCLE

  8. FILL IN THE BLANK SPACE CI_CUM_ER_NCE CHO_D DI_MET_R RA-IU- C-NTR-

  9. THE CHORD Did you know we can draw a number of chords to the circle? D C E F B G A Can you guess which is the longest chord? O

  10. RADII OF THE CIRCLE A B O C F E D We can draw a number of radii to the circle. All the radii are of equal length.

  11. RELATION BETWEEN A DIAMETER AND A RADIUS The length of the diameter is always twice the length of the radius.

  12. FIND ME WITH THE GIVEN CLUES IN THE LETTER MAZELOOK VERTICALLY HORIZONTALLY AND DIAGONALLY • I measure half of the diameter . What is the name given to me? • I am the distance around the circle. What am I called? • I lie in the middle of the circle . Who am I? • I pass through the centre and touch two ends of the circumference. What is my name? • I am a line segment and my end points lie on the circle. Can you guess the name given to me?

  13. RESOURCE MATERIAL • C.B.S.E. MATHEMATICS TEXT BOOKS OF CLASSES V, VI, VII • Encarta 2000

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