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- an angle that is 180 degrees in total
- any rod or bar or straight line in the real world is mainly 180 degrees, if they lie flat and straight then it is most likely 180 degrees.

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- if 2 distinct planes intersect, then they intersect in exactly one line
- on a laptop the keyboard side and the screen side are 2 different planes, where the laptop opens, that is where the line is where they intersect.

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- 2 angles whose sides are two opposite rays
- crossing signs create 2 vertical angles, they have opposite rays which create an 'x' looking shape

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- 2 angles that measure up to the sum of 180 degrees
- any two angles that add up to 180 degrees, a soccer goal's corner has 2 different angle measurements that add up to 180

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- lines that do not intersect are coplanar
- parallel lines are any two lines that do not intersect, so train tracks for example do not intersect at any point which makes the train move.

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- a part of a line that contains 2 endpoints and all the points between them
- on a pool lane lines, there are two end points where the pool is ending or beginning (either sides) but then everything in-between have points.

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- a polygon with 4 equal sides and 4 right angles
- most board games are square shape where they have 4, 90 degree ride angles and 4 equal sides

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- exact 90 degree angle
- all corners on tables, counters, etc are all 90 degree angles, they all create right angles.

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- a polygon with 3 sides
- on the road as we drive everyday there are signs that are triangular shaped, just like a yield sign or a pedestrian crossing sign.

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- any angle below 90 degrees
- many items In the real world are acute angles, pizza for example is most of the time an acute angle, the triangular shape is less that 90 degrees.

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- represented by a straight path that extends forever in 2 opposite directions without end and has no thickness; it contains infinite points
- lines are all around us, the lines on our furniture (tables, desks, etc) they are on our school papers if we are underLINING, they are everywhere.

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- indicates a location and has no particular size
- there are many, many, many points in the real world, they are all around us; for example a Ferris wheel had a point, the middle is where is spins and that is the point.

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- polygon with 4 straight sides and 4 right angles, with unequal adjacent sides
- a connection is with any kind of box, a shoe box for example (most are rectangular)they have 4 straight sides and 4 right angles.

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- if 2 distinct lines intersect, the they intersect in exactly 1 point
- if 2 lines intersect anywhere then they would be considered in the postulate 1-2, for example; on streets there are some that cross, so they intersect exactly at 1 point in the middle

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- any angle above a 90 degree angle
- when telling time, the hands on a clock can be at an obtuse angle, which helps us tell what exact time it is and the angle is above 90 degrees

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- a round plane figure whose boundary consists of points equidistant from a fixed point (the center)
- a connection of a circle to the real world is a tire on cars, they have a center where it is mainly attached to the car and it is circular to roll for the car to move.

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- points that lie on the same line
- on cables there are multiple points on the pole where all the lines connect, this meaning that they are all on the same line (the pole is the line)

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- a point that divides the segment into 2 congruent segments
- on maps, if a cartographer draws a segment on a map and created 3 points, the one in the middle will divide the two segments into 2 equal parts