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Transcript of circle-parts of a circle
7/21/2019 circle-parts of a circle
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Teaching DemonstrationFebruary 9, 2016
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Circles
Mathematics
Grade 7
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Review
Given the trianglebelow, what are its sides?A
RC
Its sides are
CA, AR, CR,
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What are the types of poygonsuse!"
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#b$ecti%es
1& 'ustrate an! name a circe an! itsparts( ra!ius, !iameter, chor! an!
center2& '!entify the %arious segmentsreate! to a circe&
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• Discussions
• )i!eo presentation*parts of a circe
• +ractice eercises
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+arts of the Circe
centre
ra!ius
!iameter
chor!
D
C
A
N
Y
B
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+ractice -ercises
1& .ame the circe&
2& .ame a ra!ius&
/& .ame a !iameter&
& .ame a ra!ius not !ran as part
of a !iameter&
& 3uppose the !iameter of a circe
is 0 cm, 4n! its ra!ius&
6& 'f D+ 5 20 inches, 4n! +
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Abstraction
is a set of points in a gi%en
pane, each point of hich is ate7ua !istance from a 4e! pointcae! the center&is name! by its center&
is a segment hose en!pointsare points on a circe
is a segment hose
en!points are the center ofthe circe an! a point on thecirce&
is a chor! containing thecenter
of the circe is tice its
1. A circle
2. A circle
3. A chord
4. A radius
5. A diameter
6. A diameter
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Formati%e assessment
1& .ame the circe&
2& .ame a ra!ius&
/& .ame a !iameter&
& .ame a ra!ius not !ran as part
of a !iameter&
& 3uppose the !iameter of a circe
is 0 cm, 4n! its ra!ius&
6& 'f D+ 5 20 inches, 4n! +
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Assignment
Dra !our o" circle a"d illustrate the #olloi"$
se$me"ts%
1. radius 3. chord
2. diameter
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Than8 you for
istening