Parts of a Circle

1. CIRCLE AND ITS
PARTS

2. WHAT IS A CIRCLE ??

3. A circle is a
closed curve formed
by a set of points on
a plane that are
equidistant from its
center.

4. IS THE CENTER PART OF A CIRCLE ?

5. Read again the definition.

6. PARTS OF A CIRCLE
•Radius
•Diameter
•Chord
•Tangent Line
•Secant Line
•Central Angle
•Inscribed Angle

7. BACK

8. The radius of the
circle is a straight line
drawn from the center
to the boundary line or
the circumference. The
plural of the word
radius is radii.

10. The diameter is
the line crossing the
circle and passing
through the center. It
is the twice of the
length of the radius.

12. The tangent line is any
segment, which if extended
in either direction, will only
intersect the circle once.
The point at which it
touches is called the point
of tangency.

13. SECANT LINE

14. A secant line is a
segment or line which
passes through a circle,
intersecting at two
points

15. CHORD

16. A chord is a line
segment with both
endpoints on the circle.
The diameter is a special
chord that passes
through the center of the
circle.
The diameter would
be the longest chord in
the circle.

18. CENTRAL ANGLE

19. A central angle is
an angle in
a circle with vertex at
the center of the circle.

20. INSCRIBED ANGLE

21. An inscribed angle is
an angle formed by three
points on a circle