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→Concept #4 SEMICIRCLE
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'''DEFINITION:''' PART OF A CIRCLE BOUNDED BY DIAMETER AND THE PART OF A CIRCUMFERENCE CUT OFF BY THE DIAMETER+* The student should be able to understand that a diameter divides the circle into two equal halves and each such half is a semicircle or hemicircle.<br>+* The student learns how to form a semicircle by joining any two points on the circumference through its centre .
+'''Sub units of activities:'''<br>+This is a classroom individual activity.<br>+'''Materials:'''
−15 minutes.+'''Instructions to the teacher:'''+
+'''Instructions to the students:'''+
==Concept #4 SEMICIRCLE==
==Concept #4 SEMICIRCLE==
[[File:semicircle.gif|200px|right]]
[[File:semicircle.gif|200px|right]]
−===Learning objectives===
−==='''Learning objectives'''===
+# The students should be able to understand that a diameter divides the circle into two equal halves and each such half is a semicircle or hemicircle.
−# The students learn how to form a semicircle by joining any two points on the circumference through its centre i.e. by drawing a diameter.
−==='''Notes for teachers'''===
==='''Notes for teachers'''===
−Show children the forming of semicircle by drawing diameter.
+# Show children semicircle by drawing diameter.
−==='''Activity No # 1'''===
+===Activity No # Semicircle===
−Bring cut circles of different sizes, fold them into exact halves and help them recognise semicircles. Let them colour each half with different colour.<br>
+# Bring cut circles of different sizes.
−# Fold them into exact halves.
−# Recognise semicircles. Let them colour each half with different colour.
−Materials: White paper circles, crayons.
−White paper, crayons.
{| style="height:10px; float:right; align:center;"
{| style="height:10px; float:right; align:center;"
|<div style="width:150px;border:none; border-radius:10px;box-shadow: 5px 5px 5px #888888; background:#f5f5f5; vertical-align:top; text-align:center; padding:5px;">
|<div style="width:150px;border:none; border-radius:10px;box-shadow: 5px 5px 5px #888888; background:#f5f5f5; vertical-align:top; text-align:center; padding:5px;">
''[http://www.karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div>
''[http://www.karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div>
|}
|}
−*'''Estimated Time'''
+*Estimated Time: 10 minutes
−*Materials/ Resources needed
−*'''Materials/ Resources needed'''
White paper, crayons.
White paper, crayons.
−*'''Prerequisites/Instructions, if any'''
+*Prerequisites/Instructions, if any
−The students should have prior knowledge of circle and diameter.
+# The students should have prior knowledge of circle and diameter.
−*'''Multimedia resources'''
+*Multimedia resources
Geogebra
Geogebra
*Website interactives/ links/ / Geogebra Applets
*Website interactives/ links/ / Geogebra Applets
−*'''Process/ Developmental Questions'''
+*Process/ Developmental Questions:
−# Identify the centre, circumference, diameter and semicircle of the circle.
−Ask children the previous day to cut circles of given radius and bring.
+Instructions to the teacher:
+# Ask children the previous day to cut circles of given radius and bring.
−Instructions to the students:
−Instruct them to fold circle into exact half. Draw diameter on folded line and colour each half with different colour.
+# Instruct them to fold circle into exact half.
−*'''Evaluation'''
+# Draw diameter on folded line and colour each half with different colour.
−Were the students able to draw and cut perfect circles?<br>
+*Evaluation
−Was the folded line (diameter) passing through the center of circle?<br>
+# Were the students able to draw and cut perfect circles?
−*'''Question Corner'''
+# Was the folded line (diameter) passing through the center of circle?
−In how many different ways can you draw semicircles for a given circle?
+*Question Corner
+# In how many different ways can you draw semicircles for a given circle?
===Activity No # ===
===Activity No # ===