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A straight angle is an angle that measure is exactly 180 degrees. A perfect example of a straight angle is a pen because a pen is straight like a line and it measures 180 degrees.

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A right angle is an angle who's angle is exactly 90 degrees. A example of a a right angle would be the left corner of a rubics cube.

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Postulate 1-3 is if two distinct planes intersect then they intersect in exactly  1 line. Two rulers over lapping each other is similar it postulate 1-3 because they are intersecting in exactly one line.

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Postulate 1-2 is if two distinct lines intersect, then they intersect in exactly 1 point. The 2 roads in the picture are like lines intersecting at exactly one point.

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A congruent segment are segments that have the same length. A board game spinner is similar to a congruent segment because all the lines that lead to the middle point are all the same length.

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A coplanar points are points that lie on the same plane. The cake is similar to coplanar points because the dots are like points that lie on the same plane/cake.

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A obtuse angle is an angle that measure is bigger than 90 degrees but less than 180 degrease. The fan in the picture is an obtuse angle.

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A acute angle is an angle that measure is between 0 and 90 degrees, but not including 90. The corner of the Dorito is acute angle.

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Parallel lines are two lines that never intersect. The rails on the bridge never intersect like parallel lines.

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A congruent angle are angles with the same measure. The watermelon slices are similar to congruent angles because they are all the same size/measure.

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A midpoint divides a segment into 2 congruent segments. In the picture it shows the midpoint of a pencil with each side of the pencil are congruent.

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A Vertical angle is a pair of non-adjacent angles whose sides are opposite rays. An example of a vertical angle would be a hour glass because they both have a common point in the middle of both angles or glasses.

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An angle bisector is a ray that divides an angle into 2 congruent angles. The sting ray is similar to an angle bisector because the tale of the ray intersects the middle of the sides of the sting ray.

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A line segment is a part of a line that consists of two end points and all points around them. A real life example of a line segment would be a subway map because the trail goes from dot to the other dot sort of like a line segment.

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collinear points are points that lie on the same plane. The m&m's are like collinear points in the same plane.

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a line is represented by a straight path that extends in two opposite directions without end and has no thickness.
this railroad is like a line because they both have a straight path that extends in two opposite directions.

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a plane is represented by a flat surface that extends without end and has no thickness.
In this picture of the lego is a flat surface that has no thickness with points in the plane.

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A point has no dimensions it is represented by a dot.
This picture relates to a point because in the picture it shows a center point/dot in the middle with nothing related to it.