# data[].attributes.headline
Midpoint: A midpoint divides a segment into a congruent segments.

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Midpoint: A midpoint divides a segment into a congruent segments.

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This basketball court represents a midpoint because there is a line in the middle dividing the court into two.

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Line segment: A part of a line that consists of two endpoints and all the points between them.

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Line segment: A part of a line that consists of two endpoints and all the points between them.

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This baseball bat represents a line segment because it has two endpoint the top of the bat and the bottom of the bat.

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Collinear points: Points that belong on the same line.

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Collinear points: Points that belong on the same line.

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These peas represent collinear points because they are in the same line and have points.

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Coplanar points: Points and/or lines that belong in the same plane.

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Coplanar points: Points and/or lines that belong in the same plane.

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This dresser represents coplanar points because there are points in the same plan (the knobes on the dresser are all on the same surface).

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Circle: A circle is a round-shaped figure that has no corners or edges.

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Circle: A circle is a round-shaped figure that has no corners or edges.

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This no parking sign represents a circle because it is shaped like one. And because it is a round shaped figure that has no corners or edges.

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Triangle: A triangle is a closed, 2-dimensional shape with 3 sides, 3 angles, and 3 vertices.

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Triangle: A triangle is a closed, 2-dimensional shape with 3 sides, 3 angles, and 3 vertices.

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This yield sign represents a triangle because its shaped like a triangle and has 3 sides, 3 angles, and 3 vertices.

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Square: a plane figure with four equal straight sides and four right angles.

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Square: a plane figure with four equal straight sides and four right angles.

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This chess board represents a square because it is shaped like a square and has four equal straight sides and four right angles.

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Rectangle: a plane figure with four straight sides and four right angles, especially one with unequal adjacent sides, in contrast to a square.

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Rectangle: a plane figure with four straight sides and four right angles, especially one with unequal adjacent sides, in contrast to a square.

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This tv represents a rectangle because its shape is a rectangle and it has four straight sides and four right angles.

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Angle bisector: A ray that divides an angle into two congruent angles.

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Angle bisector: A ray that divides an angle into two congruent angles.

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This leaf represents an angle bisector because its veins throughout the leaf divid each angle into two congruent angles.

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Vertical angles: A pair of non-adjacent angles whose sides are opposite rays.

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Vertical angles: A pair of non-adjacent angles whose sides are opposite rays.

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This railroad crossing sign represents a vertical angle because it a pair of non-adjacent angles that are opposite ways making an "x".

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Straight angle: An angle whose measure is exactly 180 degrees.

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Straight angle: An angle whose measure is exactly 180 degrees.

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This table represents a straight angle because its a straight surface that levels out to the angle of 180.

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Right angle: An angle whose measure is exactly 90 degrees.

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Right angle: An angle whose measure is exactly 90 degrees.

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This clock represents a right angle because the minute hand and the hour hand make a right angle.

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Obtuse angle: An angle whose measure is bigger than 90 but less than 180 degrees.

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Obtuse angle: An angle whose measure is bigger than 90 but less than 180 degrees.

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This sofa represents an obtuse angle because it shape is in an obtuse angle.

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Acute Angle: An angle whose measure is between 0 and 90 not including 90.

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Acute Angle: An angle whose measure is between 0 and 90 not including 90.

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This pizza slice represents an acute angle because it is cut in an acute angle.

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Parallel lines: Two lines in the same plane that are at equal distance from each other and never meet.

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Parallel lines: Two lines in the same plane that are at equal distance from each other and never meet.

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These railroad tracks represent parallel lines because they are two lines that never meet and are at equal distance from each other.

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Line: Represented by a straight path that extends in two opposite directions without end and has no thickness.

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Line: Represented by a straight path that extends in two opposite directions without end and has no thickness.

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These parking lot lines represent lines because they are straight and extend in two different directions.

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Plane: Represented by a flat surface that extends without end and has no thickness.

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Plane: Represented by a flat surface that extends without end and has no thickness.

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These papers represent a plane because they are a flat surface.

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Point: Indicates a location and has no size.

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Point: Indicates a location and has no size.

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The chocolate chips on this cookie represent a point.