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- the railroad has a pair of parallel lines, they are on the same plane but never meet and they are always the same distance apart

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- each of these bricks are examples of rectangles because it has 4 right angles, 4 straight angles, and one with adjacent sides of unequal length

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- a pizza box represents a square because it is a figure that has 4 straight sides and they are all equal

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- this yield sign is an example of a triangle because it is a polygon that has 3 sides and 3 vertices

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- the perimeter of something is the sum of the lengths of a polygons side. For example the perimeter of this photo is the yard because its all the sides added together

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- an example of a circle would be this orange because all the points are the same distance from the center of the orange

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- the blades on the helicopter are non-adjacent angles who sides are opposite rays, therefore it is a vertical angles

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- the bridge is an example of a straight angle because the bride is a straight line which measures exactly 180 degrees

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- each shape of the sides on the windmill open up to an obtuse angle which is more than 90 degrees and less than 180

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-the shape that the birds mouth is making when it is opened is considered an acute angle because it is less than 90 degrees.

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- the corner of this soccer field is 90 degrees, therefore it is a right angle

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-this window represents congruent segments because both lines are the same length

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- postulate 1-3 can represent a 3d x because the two planes intersect in one line which is the middle

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-postulate 1-2 means thats if any two distinct lines intersect they they intersect at example one endpoint, which the x in the photo has one endpoint in the middle

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- the ruler is considered a line segment because each point of like line are on the same endpoint (from one end of the ruler to the other)

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- the line in this photo is the 50 yd mark. a line is a straight path that extends in two opposite directions.

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-the pizza is an example of a plane because it is represented on a flat surface and has no end and no thickness.

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- the point in this photo is in the center of the Ferris wheel because it is indicating a location and has no size.