Here are the correct matches for each geometric construction:
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Perpendicular Bisector of a Line Segment - c. A shape where all sides and angles are equal parts at a right angle (This is not the best fit, so it should instead be labeled simply as a line that divides a segment into two equal parts at a right angle, but since this option is not present, c can be taken metaphorically.)
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Angle Bisector - b. A line that divides an angle into two equal angles.
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Regular Pentagon - a. A shape where all sides and angles are equal (Although not listed as an option, this is the intrinsic property of a regular polygon, thus not matching well with any given descriptions).
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Equilateral Triangle - e. A triangle where all three sides are of equal length.
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Tangent to a Circle - d. A line that touches a circle at exactly one point.
Note: It seems there might be an error or a misfit in option descriptions, as some do not perfectly match the geometric constructions listed.