Answer:
Periodic motion is the motion in which the object move or repeat itself in a fixed interval of time like earth move itself in fixed time i.e. 24 hours. Non- periodic motion is the motion in which can't repeat itself in a fixed interval of time. e.g vechiles.
Explanation:
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A triangle always adds up to 180° so if you already have two angles, add them together and subtract them from 180° to find the missing angle.
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It is to have understanding or knowledge concering a specific matter.
