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Diameter of Circle
Mathematics, Grade 6
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Study Guide Diameter of Circle Mathematics, Grade 6
❮
1
/
2
❯
DIAMETER
OF
A
CIRCLE
What
is
the
diameter
of
a
circle?
The
diameter
of
a
circle
is
a
line
segment
that
passes
through
the
center
of
a
circle
connecting
one
side
of
the
circle
to
the
other.
The
radius
of
the
circle
is
half
of
the
diameter.
It
is
a
line
segment
that
goes
from
the
center
of
the
circle
to
the
side
of
the
circle.
If
two
radii
are
drawn
from
the
center
of
the
circle,
the
angle
made
between
them
is
called
a
central
angle.
A
chord
is
a
line
segment
that
goes
from
one
side
of
the
circle
to
the
other
side
of
the
circle,
but
does
not
pass
through
the
center.
The
circumference
is
the
distance
around
the
circle,
it
is
measured
in
terms
of
the
diameter
and
the
formula
is
C
=
π
·
d,
where
π
is
3.14
and
d
is
the
diameter.
How
to
use
the
diameter
of
a
circle:
•
If
the
diameter
of
a
circle
is
known,
the
radius
can
be
found.
The
radius
is
one
half
of
the
diameter,
so
if
the
diameter
is
10,
the
radius
is
5.
If
the
radius
is
7,
the
diameter
is
14.
•
If
the
diameter
of
the
circle
is
known,
the
circumference
can
also
be
found
using
the
formula
C
=
π
·
d.
Sometimes
the
exact
circumference
is
not
needed
and
instead
of
π
being
3.14,
π
can
be
estimated
to
be
3.
Example:
Estimate
the
circumference
if
d
=
5
→
C
=
π
·
d
→
C
=
3
·
5
=
15
•
When
finding
circumference,
π
should
be
evaluated
as
given
in
the
problem.
If
the
circumference
is
given,
the
diameter
can
be
found
by
filling
in
the
circumference
and
then
dividing
by
π.
If
given
the
circumference
and
the
radius
is
needed,
find
the
diameter
and
then
divide
by
2
to
get
the
radius.
© Copyright NewPath Learning. All Rights Reserved.
Permission
is
granted
for
the
purchaser
to
print
copies
for
non-commercial
educational
purposes
only.
Visit
us
at
www.NewPathLearning.com.
Try
this!
1.
Find
the
radius:
d
=
20
d
=
36
d
=
44
2.
Find
the
circumference:
d
=
10
d
=
4
d
=
11
3.
Find
the
diameter:
C
=
6.28
units
C
=
18.84
units
© Copyright NewPath Learning. All Rights Reserved.
Permission
is
granted
for
the
purchaser
to
print
copies
for
non-commercial
educational
purposes
only.
Visit
us
at
www.NewPathLearning.com.
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