Able to explore rotations of familiar 2-D Shapes intuitively.

__Able to explore rotations of familiar 2-D Shapes intuitively.__

Draw
two vertical lines in a white paper.

(By paper folding method)

Draw
a circle with radius 6cm in a chart. Then Cut the circle from the chart. Fold
it into four equal parts and spread again. Draw/paste four pictures on the
circle as shown in the figure.

Fix/put the round chart on the white
paper by using a pin in center. By rotating the chart we observe that two
vertical lines and the center point will lie at the same point. Look at the
changes occurred, when the chart is rotated.

Turn the round chart as shown in the
figure (ii). The picture in figure (i) is changed, as in figure (ii) This
change is called as “rotation:. “O” is the “center”. When we compare the
figures (i) and (ii) the pictures are changed as one-fourth turn. When we
rotate the chart as shown in the figure (iii) the pictures are changed as half−turn.

**To Observe**

*
When we rotate, the shapes are rotated.

*
The images are rotated depending on the point.

*
The point is called as “Centre of Rotation”

**Think it: **Is there any changes
to the wings of the ventilater fan, after rotating one-fourth turn and half-turn.

**Example**

Let's
see the rotation of the square.

Tags : Geometry | Term 1 Chapter 1 | 5th Maths , 5th Maths : Term 1 Unit 1 : Geometry

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5th Maths : Term 1 Unit 1 : Geometry : Able to explore rotations of familiar 2-D Shapes intuitively | Geometry | Term 1 Chapter 1 | 5th Maths

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