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The top right angle and the bottom left angle of the cross would be vertical angles because vertical angles are two angles whose sides are opposite rays.

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A point indicates the location of something just like a pin can.

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A line segment is part of a line, which are kind of like guitar strings when they are still.

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A plane is a flat surface made up of at least three points which could be compared to a wall.

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The angle on the left and the angle on the right are congruent because they are the same size have the same value.

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The angle on the top of the railroad crossing sign and the angle of the left of the sign are adjacent because they are angles that are next to each other.

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The straight angle is 180 degrees and is a line, just like the ruler above.

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An acute angle is an angle that is less than 90 degrees, like the angles that make up tortilla chips.

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An obtuse angle is an angle that is over 90 degrees and the stop sign has several.

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A right angle is an angle of exactly 90 degrees just like a door frame.

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A perimeter is the line that serves as the boundary for shapes, just as the fence serves as a boundary for this farm.

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Parallel lines are lines that never intersect, just like the handrails on these stairs.

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Postulate 1-3 states that if two distinct planes intersect, then they intersect in exactly 1 line which is a lot like when two staircases intersect on one stair.

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Postulate 1-2 states that if two distinct lines intersect, then they intersect in exactly 1 point, which can be seen in the crossed roads above.

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A rectangle is a shape with four right angles, just like the book above.

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A circle consists of all the points that are an equal distance away from a specific point, which can be seen as the shape of many things, including this mirror.

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A triangle is a figure that consists of three sides and three angles, just like the pizza slice above.

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One example of a square would be a pizza box which has four equal sides and four right angles.