Circle: It is a closed curve on a plane such that all
points of the curve are the same distance from a point that lies within the curve. This
point is called the centre. There are 360 degrees in a
circle.
Center: Center of a circle is the point from which
all points of a circle are at the same
distance.
Congruent:Congruence refers to two or more
geometrical figures that have same size and shapes. All circles with same diameter are
congruent.
Chord: Chord of a circle is a straight line
between two points on the circumference of a
circle.
Diameter: Diameter is a chord that passes through
the center of a circle. It is the longest chord of a circle, and divides the circle in
two equal pars called semicircles. Diameter is also used to represent the length of such
a chord.
Radius: It is the distance from the
centre of a circle to the circumference. It equals half the length of a diameter. The
word radius is also used to mean any line that joins the centre to the
circumference.
Secant: It is is a straight line that
intersects a circle at two points.
Tangent: A line that
just touches the circle, or meets the circle at just one point, is called a tangent. The
term tangent is used for any curve and not just
circles.
Tangent circles:This refers to two or more circles
that intersect in a single point. A tangent touching one circle at this point of
intersection is also the tangent for all other intersecting circles. There are two
types of tangency: internal and external. In internal tangency all circles with common
tangent are contained within one another. In external tangency the intersecting circles
are outside each other. At one common point of intersection it is possible o have only
two such circle.
Common internal tangent: It is tangent
that is common to a number of circles contained within each
other.
Common external tangent: It is tangent
that is a to two circles that are external to each
other.
Concentric circles: Concentric circles are two ore
more circle with a common center.
No comments:
Post a Comment