Parts of a Circle
Emerald Group
Key Words
RADIUS (PLURAL: RADII):
SECTOR
SEGMENT
ARC
TANGENT
CHORD
CIRCUMFERENCE
DIAMETER
CENTER
circle
circle is a round shape that has no
corners or line segments, The different
parts of a circle are radius, diameter,
chord, tangent, arc, centre,
sector,segment, circumference.
Diameter
The diameter is twice the length of
the radius of a circle.
Or : It's the largest distance between
any 2 points on a circle ( always pass
through the center of the circle )
Radius:
Is a segment with endpoints at the
center of a circle and on the circle.
Identify Segments in a Circle
identify a radius in
this circle
Circumference
the circumference is the perimeter of a
circle or ellipse. That is, the
circumference would be the arc length
of the circle,
Sector:
Sector is the area enclosed between
two radius
Minor sector
Is the smallest
shaded part
Major sector
The largest shaded part
Arc
part of circumference of a circle
Tangent:
A straight line that touches the
circumference of the circle at only
one point
Chord:
Is a straight line segment whose
endpoints both lie on a circular
arc.
segment
A segment of a circle is
an enclosed area
combining between arc
and chord
Minor segment
made by a minor
arc
Major segment
made by a major
arc