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| *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;" |