LENTH OF CHORD

1. SLIDE PRESENTATION

2. WELCOME

3. NEW B.Ed COLLEGE
NELLIMOODU
(2014-2015)

4. NAME : ASWATHY.C.B
OPTION : MATHEMATICS
CANDIDATE CODE : 18014376007

5. TOPIC : LENGTH OF A CHORD

6. CHORD
A LINE JOINING ANY PAIR OF POINTS ON A
CIRCLE IS CALLED A CHORD.

7. IN A CIRCLE WE
CAN DRAW VARIOUS
CHORDS.

8. CHORDS GET
SHORTER AS THEY MOVE
AWAY FROM CENTER.

9. LONGEST CHORD IN A CIRCLE
IS CALLED ITS DIAMETER.

10. CHORDS EQUIDISTANT FROM THE
CENTER ARE OF EQUAL LENGTH.

11. A
B
WE HAVE TO FIND THE
LENGTH OF CHORD AB

12. A
B
Or
d
DRAW A CIRCLE WITH CENTER ‘O’ , AO,
RADIUS OF CIRCLE IS ‘r’ and OC,
PERPENDICULAR DISTANCE FROM O TO
AB IS ‘d’.
C

13. A
THEN BY
“PYTHAGOROUS THEOREM”,
AC2 = r2 – d2
AND
AC=1/2 AB

14. THEN WE GET ,
AB = 2AC
= 2 r2 - d2

15. LENGTH OF A CHORD
LENGTH OF A CHORD , AB = 2 r2 - d2
WHERE ‘r’ = RADIUS
AND
‘d’ = PERPENDICULAR DISTANCE

16. THANK YOU