GEOMETRICAL SHAPES

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CLASS IV MATHEMATICS
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KENDRIYA VIDYALAYA
TIRUMALAGIRI
PRESENTATION PREPARED BY
Mrs.Pushpa Kurian
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GEOMETRICAL SHAPES

• BY
• PUSHPA KURIAN

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OPEN AND CLOSED CURVESThe first 2 are open
and the next 3 are closed figures.
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SIMPLE CLOSED CURVES.

• A closed curve which does not cross itself is
  called a simple closed curve .
• Eg

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NOTE The following are not simple closed
curves.
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POLYGONS

• The simple closed curves which are made of line
  segments alone are called polygons.
• Note polygons are formed of three or more line
  segments .
• EgTriangle ( 3 line segments )
• Quadrilateral ( 4 line segments)

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NOTEThe following simple closed curves are not
polygons.
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SPECIAL kinds of QUADRILATERALS

• RECTANGLE
• SQUARE

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TRIANGLE

• Triangle has 3 sides AB BC CA
  
• 3 vertices A B
  C
• 3 angles

C
B
A
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RECTANGLE

• It has 4 sides AB BC CD DA
  
• 4 vertices A B C D
• Its opposite sides are equal
• A B CD BC DA

D
C
A
B
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SQUARE

• It has 4 sides AB BC CD DA
• It has 4 vertices A B C D
• Its all sides are equal
• AB BC CD DA

A
B
C
D
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CLASS IV

• MATHEMATICS

CLASS IV MATHEMATICS