PPT: Circles | Mathematics for Class 5 PDF Download

 Page 1


C I R C L E S
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C I R C L E S
CIRCLE
A circle is a closed curve.
A circle can be defined as a simple closed
curve all of whose points are equidistant (at
equal distance) from the fixed point called
its c e n t r e.
Page 3


C I R C L E S
CIRCLE
A circle is a closed curve.
A circle can be defined as a simple closed
curve all of whose points are equidistant (at
equal distance) from the fixed point called
its c e n t r e.
R = RADIUS
Radius is the distance between
the centre of a circle and a
point on the circumference.
Radius = OA = OB
TERMS RELATED TO CIRCLES
Page 4


C I R C L E S
CIRCLE
A circle is a closed curve.
A circle can be defined as a simple closed
curve all of whose points are equidistant (at
equal distance) from the fixed point called
its c e n t r e.
R = RADIUS
Radius is the distance between
the centre of a circle and a
point on the circumference.
Radius = OA = OB
TERMS RELATED TO CIRCLES
Diameter (D) is a line segment
that has its end points on the
circle and passes through the
centre.
Diameter = AB
AB = (OA + OB) = 2 × OA or 2 × OB
DIAMETER = 2 × RADIUS
RADIUS = DIAMETER ÷ 2
Page 5


C I R C L E S
CIRCLE
A circle is a closed curve.
A circle can be defined as a simple closed
curve all of whose points are equidistant (at
equal distance) from the fixed point called
its c e n t r e.
R = RADIUS
Radius is the distance between
the centre of a circle and a
point on the circumference.
Radius = OA = OB
TERMS RELATED TO CIRCLES
Diameter (D) is a line segment
that has its end points on the
circle and passes through the
centre.
Diameter = AB
AB = (OA + OB) = 2 × OA or 2 × OB
DIAMETER = 2 × RADIUS
RADIUS = DIAMETER ÷ 2
C h o r d is a line segment whose
end points lie on the circle.
LM, PQ, AB are all chords of the
circle.
Diameter is the longest chord
of the circle.