Explain something about concept angle
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the angle that a ray of light or the like, reflected from a surface, makes with a normal to the surface at the point of reflection. Abbreviation: aor.
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Step-by-step explanation:
In Euclidean geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.
Type of Angle. Description
Acute Angle. is less than 90°
Right Angle. is 90° exactly
Obtuse Angle is greater than 90° but less than 180°
Straight Angle. is 180° exactly
measurement
- Angles can be either straight, right, acute or obtuse.
- An angle is a fraction of a circle where the whole circle is 360°.
- A straight angle is the same as half the circle and is 180° whereas a right angle is a quarter of a circle and is 90°.
- You measure the size of an angle with a protractor.
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