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This pen does not have another line meet it at a point and is completely horizontal, so it is straight with a measure of 180 degrees.

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The stick on the mop keeps extending in both directions and is completely straight, making it a line.

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The two ends (the circle figures) on the end of the straight line make the line a segment. The line doesn't go on, so it's a segment.

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Supplementary Angles that form a linear pair

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Supplementary Angles that form a linear pair

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The two angles made by the wood lines (the one on the bottom and in the middle) both add up to 180 degrees. They are also both on the same line, making them a linear pair.

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The two sides of the fireplace (lines) both meet at the same point and the angle they make is greater than 90 degrees, making it

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The triangles on the thermostat have three sides (a, b, c) and and a height.

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These two markers meet at a point. The angle they make is less than 90 degrees, making it an acute angle.

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Two straight lines on the fireplace tile both intersect, forming an angle on each side with the same measurement.

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The two lines of the windowsill meet at a point and are straight vertical and straight horizontal, forming a right, 90 degree angle at the point they meet at.

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This blanket extends in all directions and can contain different "points" if they are placed on it.

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The two socks (which represent points) are both laying on the same straight line on the ground.

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These magnets are both on sticking to same plane, the metal sheet.

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This door has two pairs of equal sides. It is also enclosed and has four sides.

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This pillow has four equal sides and is enclosed. You could also find the area and perimeter if you wanted to.

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This ball represents a point of location on the endless plane it is on (which is the floor).

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This circle has no edges and you can find the circumference and area of it, like a circle in math.

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The plane of the windowsill is meeting the plane of the wall at the line in the middle of them