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A compass can be a midpoint because it has a point that divides a segment into two congruent segments.

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A jungle gym can be a congruent segment because it has lines in it that have the same lengths.

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A clock could be a complementary angle because the two angles sum is 90 degrees.

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A piece of paper can be a plane because it is a flat surface of two dimensions.

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A pizza slice can be an acute angle because it is an angle that measures between 0 and 90 degrees.

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Open scissors can be a vertical angle because it has pairs of opposite angles made by two intersecting lines.

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Half of a pizza can be a straight angle because it has a side of 180 degrees.

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A pencil can be a line segment because it is a line with two endpoints.

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A M&M brownie can be a coplanar point because the M&Ms are points that lie on the same plane.

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A dart board can be a point because it has no dimension and is represented by a dot.

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A pizza box can represent a square because it is a polygon with four equal sides and four right angles.

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An onigiri can represent a triangle because it has exactly 3 angles and sides.

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A fence around a house represents a perimeter because it is a continuous line forming the rectangular boundary around the house.

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A Chinese fan represents an obtuse angle because it measures between 90 and 180 degrees.

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A Bible represents a right angle because of the 90 degree angles on each side of it.

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A train track represents a parallel line because it has lines that do not intersect and are coplanar.

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A bicycle wheel represents a circle because it is a round plane with all the points a certain distance from the centre.

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A chalkboard can represent a rectangle because it contains unequal adjacent sides and four right angles.