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The field has a perimeter because that is the area around it and it's length and width. 

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The dart board is a circle because it has no corners or edges or sides. 

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The rack is a triangle because it has 3 equal sides. 

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The dice is a square because it has 4 equal sides. 

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The chocolate bar is a rectangle because it has 4 sides with two being the same length and the other 2 a different length.  

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The railroad sign is a vertical angle because the signs cross each other vertically. 

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The rainbow is like a straight angle because it measure to 180 degrees. 

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The door is like a right angle because the corners measure to 90 degrees. 

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The clock hands are like an obtuse angle because they measure more than 90 degrees. 

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A pizza slice is like an acute angle because it measures less than 90 degrees. 

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The seesaw has a midpoint that helps it move up and down. 

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Railroad tracks are like parallel lines because they never intersect. 

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A road is like a line because it shows the distance of a straight road. And it is not part of a segment. 

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A pencil is like a line segment because it is a straight line and could be part of a line.  

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Flowers in one row in a garden is an example of collinear points because the flowers are like points on a line. 

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Top of desk has 4 points on each corner, that are on the plane (desk).

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Paper is like a plane because it is 2D and doesn't have depth. 

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Stars are like points because they are little locations in the sky and look like points.