In reflection, the line joining the object and the image is perpendicular to the mirror line.
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The Axis of reflection is the perpendicular bisector of the line segment joining same ends of object and image.
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In reflection, the object figure and its image figure are congruent to each other.
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Reflection in X- axis means reflection in the line y = 0.
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The distance of the object from the axis of reflection is equal to the distance of reflection is equal to the distance of the image from the axis is a reflection.