Basic terms… Circles : Basic terms… Circles
Slide 2 : Basic terms related to circle Here you will learn
Slide 3 : The bottom and top of a bucket is usually a circle.
A playing drum is circular.
A clock is usually circular.
The top of the table shown below is a circle. Where do you find circles? Look around you! There are circles everywhere !
Slide 4 : Basic terms related to a circle.... Centre & radius Chord Minor arc & major arc Diameter Minor segment &
major segment Central angle Circumference Circular region Sector
Slide 5 : A line segment joining any two points
on the circle is called a chord of a circle. O Here AB is a chord . A B Chord
Slide 6 : A chord passing through the centre of the circle is called the diameter . It is the longest chord. A B C D Here AB is diameter. Diameter
Slide 7 : The circumference of a circle is the distance around the outside of it. Here light blue portion is circular
region. Circumference
Slide 8 : A circle along with its
interior is called the circular region. Circular region Circular region
Slide 9 : Any two points of the circle divide the
circle into two parts called the arcs . The smaller part is called the minor arc and the larger part is called the major arc. In case the two parts are equal each one of them is called a semicircle. . Horizontal lines region
is the minor segment and
the remaining circular region
is the major segment Minor arc ,
Major arc
Slide 10 : A chord divides a circular region into
two parts called the segments of the circular region. The smaller segment is called as minor segment and the larger
segment is called as the major segment. Horizontal lines region
is the minor segment and
the remaining circular region
is the major segment Minor Segment,
Major Segment
Slide 11 : The angle subtended by an arc at the centre of the circle is called the central angle. Central angle
Slide 12 : A B Corresponding to a given arc, the
region bounded by the
two radii and the arc itself. Sector
Slide 13 : Thank You