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Parts of a circle
Parts of a circle
The center of a circle is the
midpoint where all the radii meet.
It can also be defined as the
midpoint of the diameter of the
circle.
Parts of a circle
The diameter of a circle is a line
segment that passes through the
center of a circle and has two
endpoints at the circumference.
It is twice the length of the radius
of a circle.
Parts of a circle
The radius of a circle is defined as a line
segment that joins the center to the
boundary of a circle.
The length of the radius remains the same
from the center to any point on the
circumference of the circle.
The radius is half the length of the diameter.
Parts of a circle
The chord of a circle is
defined as the line segment
joining any two points on the
circumference of the circle.
Parts of a circle
A tangent is the line drawn
from an external point and
passes through a point on the
curve.
Parts of a circle
Point of tangency is when the
tangent and the circle touch
each other.
Parts of a circle
Secant of a circle is the line
that cut across the circle
intersecting the circle at 2
distinct points.
Parts of a circle
Circumference of a circle
or perimeter of a circle is
the measurement of the
boundary of the circle.
Parts of a circle
There are 2 types of Arc.
They’re Major Arc and
Minor Arc.
Parts of a circle
A major arc is an arc that
subtends an angle of more
than 180° to the center of
the circle.
Parts of a circle
A minor arc is as same as
major arc but it has less
than 180°.
Parts of a circle
A sector of a circle is a pieshaped part of a circle made of
the arc along with its two radii.
Parts of a circle
A semi-circle is basically a half circle.
A segment of a circle is the region
that is bounded by an arc and a
chord of the circle.
Parts of a circle
Interior of a circle mean
the inside of the circle.
Exterior of a circle mean
the outside of the circle.
Numbers of tangents to
a circle from a point
There’s no tangent to a
circle passing through a
point that lies inside a
circle.
Numbers of tangents to
a circle from a point
There’s exactly one
tangent to a circle passing
through a point that lies
on a circle.
Numbers of tangents to
a circle from a point
There’re exactly two
tangents to a circle
passing through a point
that lies outside the circle.
Numbers of tangents to
a circle from a point
There’re two types of
common tangent.
Numbers of tangents to
a circle from a point
Intersection of
two circles
Intersection of
two circles
When the distance of two
circles is bigger than the
addition of two radius then
one circle is outside of the
other circle.
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Intersection of
two circles
When the distance of two
circles is as same as the
addition of two radius then
both of the circles are
touching each other.
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Intersection of
two circles
When the distance of two
circles is as same as the
subtraction of two radius then
both circles are touching at
one point.
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Intersection of
two circles
When the distance of two circles is
greater than subtraction of two
radius or the addition of two radius
is greater than the distance of two
circles circle then both circles are
touching at two different point.
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Intersection of
two circles
When the distance of two circles is
smaller than subtraction of two
radius then the small circle is inside
the big circle and they don’t touch
at any point.
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Degree measurement
of Arc
200°
100°
Degree measurement
of Arc
90°
90°
Degree measurement
of Arc
90°
90°
Degree measurement
of Arc
Degree measurement
of Arc
Degree measurement
of Arc