head 1.4; access; symbols; locks; strict; comment @# @; 1.4 date 2017.06.18.02.07.51; author root; state Exp; branches; next 1.3; 1.3 date 2017.06.17.12.51.11; author root; state Exp; branches; next 1.2; 1.2 date 2017.06.15.10.09.12; author root; state Exp; branches; next 1.1; 1.1 date 2017.06.15.10.09.11; author root; state Exp; branches; next ; desc @This document (Activity 1: Exploring Matchstick Shapes) is re-created by administrator on 17 May 2017 @ 1.4 log @This document (Activity 1: Exploring Matchstick Shapes) is lastly updated by administrator status:PUBLISHED on 18 June 2017 @ text @{ "_id": { "$oid": "59425cc74975ac013cccbafc" }, "_type": "GSystem", "access_policy": "PUBLIC", "altnames": "Activity 1: Exploring Matchstick Shapes", "annotations": [], "attribute_set": [], "author_set": [ 1 ], "collection_set": [], "comment_enabled": null, "content": "
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GEOMETRIC REASONING\r\n

Activity 1: Exploring Matchstick Shapes

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\r\nTask 1

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\r\n

Make a triangle, a square and pentagon using the matchsticks and valve tubes.

\r\n\"img1\"
\r\n \r\n
\r\n

\"Do\"Do this!

\r\n
\r\n\r\n
\r\n

Make joints-of-two as shown using matchsticks and cycle valve tubes to make the shapes. Make sure the sticks are inserted properly in the tubes to form the joints!

\r\n
\r\n \r\n\r\n

Task 2

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\r\n

Perform these actions (mentioned in the table) on the square.
\r\nDiscuss in your group whether the shape changes or not and note it down.

\r\n
\r\n\"img2\"\r\n
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\"Think\"Think about this!

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What, according to you, is \u2018shape\u2019? What causes a \u2018shape\u2019 to change?

\r\n
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Task 3

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\r\n

Try pressing on the opposite vertices of the pentagon.
\r\nDoes it change shape?
\r\nNow try pressing a vertex and a side of the triangle.
\r\nDoes it change shape?

\r\n\"img3\"\r\n
\r\n

\"Think\"Think about this!

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What will happen if you do the same with a hexagon? Which shape does not change when pressed? How might this property be useful to us?

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Extension Task 1

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 \r\n

Try making as many different shapes as possible by deforming/twisting the pentagon (without breaking it or opening up the joints). In particular, try to make

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    \r\n\t
  • \r\n\t

    a triangle that has exactly two sides equal

    \r\n\t
    • \r\n\t
  • a four sided polygon
    • \r\n\t
  • a star shape
    • \r\n
\r\n\r\n

Extension Task 2

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\r\nTry making a triangle in which all three sides are of different length. What would be the minimum number of matchsticks needed for this?
\r\n
\r\n
\r\n 
\r\n
\r\n
\r\n", "content_org": "
\r\n\r\n\r\n
\r\n
GEOMETRIC REASONING\r\n

Exploring Matchstick Shapes

\r\n\r\n
\r\n\r\n
\r\n


\r\nTask 1

\r\n\r\n
\r\n

Make a triangle, a square and pentagon using the matchsticks and valve tubes.

\r\n
\r\n\"L01\"\r\n
\r\n

\"Do\"Do this!

\r\n
\r\n\r\n
\r\n

Make joints-of-two as shown using matchsticks and cycle valve tubes to make the shapes. Make sure the sticks are inserted properly in the tubes to form the joints!

\r\n
\r\n \r\n\r\n

Task 2

\r\n\r\n
\r\n

Perform these actions (mentioned in the table) on the square.
\r\nDiscuss in your group whether the shape changes or not and note it down.

\r\n
\r\n\"L01\"\r\n

 

\r\n\r\n
\r\n

\"Think\"Think about this!

\r\n
\r\n\r\n
\r\n

What, according to you, is \u2018shape\u2019? What causes a \u2018shape\u2019 to change?

\r\n
\r\n\r\n

Task 3

\r\n\r\n
\r\n

Try pressing on the opposite vertices of the pentagon.
\r\nDoes it change shape?
\r\nNow try pressing a vertex and a side of the triangle.
\r\nDoes it change shape?

\r\n
\r\n\"L01\"\r\n
\r\n

\"Think\"Think about this!

\r\n
\r\n\r\n
\r\n

What will happen if you do the same with a hexagon? Which shape does not change when pressed? How might this property be useful to us?

\r\n
\r\n\r\n

Extension Task 1

\r\n\r\n
 \r\n

Try making as many different shapes as possible by deforming/twisting the pentagon (without breaking it or opening up the joints). In particular, try to make

\r\n\r\n
    \r\n\t
  • \r\n\t

    a triangle that has exactly two sides equal

    \r\n\t
    • \r\n\t
  • a four sided polygon
    • \r\n\t
  • a star shape
    • \r\n
\r\n\r\n

Extension Task 2

\r\n\r\n
\r\n
\r\nTry making a triangle in which all three sides are of different length. What would be the minimum number of matchsticks needed for this?
\r\n
\r\n
\r\n 
\r\n
\r\n
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