___ is known as straight angle
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Step-by-step explanation:
The measure of an angleis the amount of turn or rotation of a point from one arm to another along its vertex. When the arms of the angle lie in the opposite direction, they form a straight angle. The angles make a straight line through the vertex. A straight angle is also called 'flat angle'.
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180° is known as straight angle .
A straight angle changes the direction to point the opposite way . It measures 180° means half a revolution or two right angles.
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