1,040
edits
Changes
From Karnataka Open Educational Resources
→Concept #7
Line 320:
Line 320:
+ +
*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>
+{| 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
−*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 # ===
{| style="height:10px; float:right; align:center;"
{| style="height:10px; float:right; align:center;"
