The document defines key terms related to circles: - A circle has a center, radius, diameter, and circumference. A chord and secant intersect a circle at two points, while a tangent intersects at one point. - Angles can be central, inscribed, interior inscribed, exterior inscribed, depending on whether their vertex is at the center or on the circle. - Other terms defined are arc, intercepted arc, and sector, which refer to portions of the circle.

1. Presented by :
Septi Ratnasari (4101412082)

2. Centre ( Pusat Lingkaran )
All points are the same
distance from the center.
o
Centre O

3. Radius ( jari-jari )
A
o
The segment joining the
center of a circle to a
point on the circle.
Example: OA

4. Diameter
A chord that passes
through the center of a
circle.
Example: AB
A
O
B

5. Chord ( Tali Busur )
B
A
O
A segment joining two
points on a circle
Example: AB

6. Secant
A
C
A line that intersects the
circle at exactly two
points.
Example: AB
O
D
B

7. Tangent ( Garis Singgung )
B
C
A line that intersects a
circle at exactly one
point.
A
Example: AB

8. Central Angle ( Sudut Pusat )
A
An angle whose vertex is
at the center of a circle.
B
Example: Angle ABC
C

9. Inscribed Angle ( Sudut Keliling )
An angle whose vertex is
B
A
C
on a circle and whose
sides are determined by
two chords.
Example: Angle ABC

10. Interior Inscribed Angle
( Sudut Dalam Berseberangan )
D
A
B
F
C
Example: angle ABC
angle DBF

11. Eksterior Inscribed Angle
(Sudut Luar Berseberangan)
B
D
Example: angle ABC
A
E
C

12. Arc ( busur )
A figure consisting of two
points on a circle and all
the points on the circle
needed to connect them
by a single path.
Example: arc AB
B
A

13. Intercepted Arc
B
A
C
An arc that lies in the
interior of an inscribed
angle.
Example: arc AC

14. Sector ( juring )
Segment ( tembereng )

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