This document defines and explains key terms related to circles, including: center, radius, diameter, chord, arc, semicircle, minor arc, major arc, central angle, inscribed angle, secant, and tangent. It provides illustrations and definitions for each term. The objectives are to define, identify and name these circle terms. Examples are given to have the reader name parts of circles and identify diameters, radii, chords, and other elements.

1. MATHEMATICS 7
QUARTER 3 WEEK 7

4. CIRCLE
and its parts

5. Objectives:
• Define, identify and name the terms
related to the circle:
a. center d. diameter
b. radius e. arc
c. chord

6. CIRCLE AND ITS PARTS
• A circle is the set
of all points in a
plane at a given
distance (radius)
from a given point
(center) in the
plane.

7. CIRCLE AND ITS PARTS
• A circle is the set
of all points in a
plane at a given
distance (radius)
from a given point
(center) in the
plane.

8. CIRCLE AND ITS PARTS
It is named by its
center.
• A

9. CIRCLE AND ITS PARTS
A radius of a circle
is a line segment
from center to any
point of the circle.
radii:

10. CIRCLE AND ITS PARTS
A chord of a circle
is a line segment
whose endpoints lie
on the circle

11. CIRCLE AND ITS PARTS
A diameter of a
circle is a chord
containing the
center.

12. CIRCLE AND ITS PARTS
1. Name the circle.
2. Identify all
diameters.
3. Identify all radii.
4. Identify all
chords.

13. CIRCLE AND ITS PARTS
Name the following:
1. Name the circle.
2. Identify all
diameters.
3. Identify all radii.
4. Identify all
chords.

14. ARCS OF A CIRCLE
•semicircle
•minor arc
•major arc

15. ARCS OF A CIRCLE
• A semicircle is an
arc of a circle
whose endpoints
are the points of
the diameter.

16. ARCS OF A CIRCLE
• A minor arc is an
arc of a circle that
is smaller than a
semicircle

17. ARCS OF A CIRCLE
• A major arc is an
arc of a circle that
is larger than a
semicircle.

19. ANGLES OF A CIRCLE
• A central angle is
an angle whose
vertex is the center
of the circle.

20. ANGLES OF A CIRCLE
• A central angle is
an angle whose
vertex is the center
of the circle.

21. • An inscribed angle
is an angle whose
vertex is the center
of the circle

22. • An inscribed angle
is an angle whose
vertex is the center
of the circle

24. SECANT AND TANGENT OF A CIRCLE
• A secant of a circle
is a line that
intersects the
circle in two points.

25. SECANT AND TANGENT OF A CIRCLE
• A tangent of a
circle is a line lying
on the same plane
that intersects the
circle in exactly
one point.

26. SECANT AND TANGENT OF A CIRCLE
POINT OF
TANGENCY
• E

27. EXERCISES

28. ASSIGNMENT