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From Karnataka Open Educational Resources
→Concept #7
*Question Corner
*Question Corner
==Concept #7==
==Concept #7 ARC==
===Learning objectives===
===Learning objectives===
*The students should understand that an arc is a slice of a circle included between two radii of the circle.<br>
*The students should understand the two types of arcs -minor arc and major arc. The larger arc is called a major arc and the smaller one is called minor arc.
===Notes for teachers===
===Notes for teachers===
===Activity No # ===
Explain the concept of arc by drawing a circle and two radii within it. The part of the circle enclosed within and outside the two radii are called its arcs.
===Activity No # 1===
Get a circular chapati. Cut out a slice by marking its radii and depict major and minor arcs.<br>
This is a classroom individual activity.<br>
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''[http://www.karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div>
''[http://www.karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div>
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*Estimated Time
*'''Estimated Time''' : 10 minutes
*Materials/ Resources needed
*Materials/ Resources needed
*Prerequisites/Instructions, if any
Chapatis, scissors and scale.
*Multimedia resources
*'''Prerequisites/Instructions, if any'''
The students should have prior knowledge of circle, circumference, radius and line segment.<br>
'''Instructions to the teacher:'''<br>
Instruct the children previous day to get circular chapatis.<br>
Instruct them to mark the center of circle by folding it twice over.<br>
'''Instructions to the students:'''<br>
Roll chapatis and cut using circular lids to get exact circle shape.
*Multimedia resources
*Website interactives/ links/ / Geogebra Applets
*Website interactives/ links/ / Geogebra Applets
*Process/ Developmental Questions
*'''Process/ Developmental Questions'''
*Evaluation
*'''Evaluation'''
*Question Corner
Were the chapatis exact in circle shape.<br>
Could the students mark its centre, radii and identify the major and minor arcs.
*'''Question Corner'''
What is the longest arc of a circle which forms the circle called?<br>
Can you distinguish major and minor arcs when the two radii involved are at 180 degrees.<br>
===Activity No # ===
===Activity No # ===
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