Grade 5, Maths Olympiad (CBSE) - Angles 

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Grade 5  |   Maths  |   Angles, Geometry, Area and Perimeter, Olympiad, CBSE, ICSE, Maths Olympiad, Science Olympiad, English Olympiad

Angles

When two lines meet at a point, they form an angle at that point. An angle is actually the measurement of turn. It is measured in degrees e.g. 90° or 90 degree. 

An angle gives an idea about the degree by which a line should be turned along its one end to overlap the other line.

There are different types of angles

1) Acute Angle: If the angle is less than 90° then it is called an acute angle.

2) Obtuse Angle: If the angle is greater than 90° then it is called an obtuse angle.

3) Right Angle: If the angle is equal to 90° then it is called a right angle.

4) Straight angle: If the angle is equal to 180° then it is called a straight angle.

Imp points:

  • All internal angles of a triangle sum up to 180°.
  • If we take a complete round turn we rotate by 360°.
  • When a thing turns upside down it turns by 180°.




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