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this sign is an example of a vertical angle because its sides form two opposite rays.

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this alligators mouth is an acute angle because it is opened up less than 90 degrees.

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this symbol is an adjacent angle because it the two angles share a vertex and share a common side (there are actually 3 adjacent angles in this picture).

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half of this grilled cheese is a right angle because it equals 90 degrees.

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the two planes (the wall and floor) intersect at one line

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these roads are a supplementary angle because if you were to add the angles of the two roads together, it would be 180 degrees.

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this is an example of a circle because it is a round plane with no edges.

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this resent is a square because it has 4 equal sides with 4 right angles.

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the two roads intersect at one point.

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this coplanar because the balls represent different points on the plane (the table).

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this line is one dimensional and extends infinitely in both directions.

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the two pies are cut right down the middle and it creates a bisector.

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the two buildings have the same angles on them.

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this hand rail is a straight angle because it would equal 180 degrees if we measured it.

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this cake is a polygon with 4 straight sides, 4 right angles, and unequal adjacent sides.

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this dorito is a polygon with three sides.

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the two angles on the clock can be added up to create a 90 degree angle.

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the angle on this windmill is an obtuse angle because it it greater than 90 degrees.