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Angles
by Chandran S
Pages 6 and 7 of 11
History behind the term "Angles":
The first concept was used by
Eudemus
, who regarded an angle as a deviation from a straight line;
the second by
Carpus of Antioch
, who regarded it as the interval or space between the intersecting lines; Euclid adopted the third concept.
Thought Bubble
Angle:
*An angle can be defined as the figure formed by two rays meeting at a common end point.
* An
angle
is represented by the symbol '
∠' .
Types of Angles:
* Acute Angle
* Right Angle
* Obtuse Angle
* Straight Angle
*Reflex Angle
*Full Rotation
Rounded Rectangle
Acute Angle:
* Less than 90 degrees
Rounded Rectangle
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Obtuse Angle:
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*angle greater than 90°
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Rounded Rectangle
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Right angle
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*exactly 90 degrees
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Rounded Rectangle
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Straight angle:
Rounded Rectangle
*exactly 180 degree
Reflex angle:
*greater than 180 degree
Rounded Rectangle
Free Rotation:
*
exact 360 degree
Rounded Rectangle
lets have a try !
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