This document defines key terms related to circles such as radius, diameter, chord, secant, and tangent. It explains that a circle is the set of points in a plane that are the same distance from a fixed center point. A compass is used to draw a circle, and the diameter of a circle is twice as long as the radius. A chord is a line segment whose endpoints lie on the circle but do not pass through the center, while a tangent touches the circle at only one point.

1. Circle

2. Circle
is the set of points in a
plane that are same
distance from a fixed
point in the center.

3. Compass
is an instrument
used to draw a
circle.

4. Center
is equidistant
from all points
on the circle.

5. Diameter
distance from
one point
on a circle to
another.

6. Radius
is a line segment
joining the center
of the circle to
any point on the
circle

7. Chordis a line segment
whose endpoint
lies on the circle
and do not
intersects on the
center.

8. Secant
is an extended
chord, a coplanar
straight line cutting
the circle at two
points.

9. Tangent
is a coplanar straight
line that
touches the
circle at a
single point.

11. What is circle?

12. A circle is a set of points
in a plane that are same
distance from a fixed
point in the center.

13. What is the
instrument used
to draw a circle?

14. The instrument
used to draw
a circle is
compass.

15. Compare the measure of
the radius to the measure
of diameter.

16. The measure of
the diameter is
twice the
measure of the
radius.

17. What is chord?

18. A line segment
whose endpoint
lies on the
circle and do
not intersects
on the center.

19. What is tangent?

20. Tangent is a
coplanar
straight line
that touches
the circle at a
single point.

22. Activity

23. A. in numbers 1-5, identify the
parts of the circle.

24. 1.

25. 2.

26. 3.

27. 4.

28. 5.

29. B.in numbers 6-10, write true if
the statement is correct and
write false if the statement is
wrong.

30. 6. Ruler is used
to draw a circle.

31. 7. The measure of the
diameter is twice the
measure of radius.

32. 8. Secant is an extended
chord that divides the
circle into two.

33. 9. Chord is a line segment
whose endpoints lie on the
circle and do not intersects
on the center.

34. 10. Circle is the set of points in a
plane that are the same distance
from a fixed point in the center.

35. Assignment:
1. Define circumference and area.
2. Give the formula in finding the
circumference and area of a circle.
Reference: Modern Geometry pages
102-105