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Vertical Angles-are a pair of opposite angles formed by intersecting lines.

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Vertical Angles-are a pair of opposite angles formed by intersecting lines.

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Obtuse Angle- is any angle greater than 90

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Obtuse Angle- is any angle greater than 90

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Acute Angle-is an angle that measures between 90° and 0

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Acute Angle-is an angle that measures between 90° and 0

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Segment Bisector-is a line, ray, or segment that cuts another line segment at the center dividing the line into two equal halves.

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Segment Bisector-is a line, ray, or segment that cuts another line segment at the center dividing the line into two equal halves.

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Midpoint-s the middle point of a line segment.

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Midpoint-s the middle point of a line segment.

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Congrent Segments-are segments that have the same length.

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Congrent Segments-are segments that have the same length.

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Postulate 1-3-If two distinct planes intersect, they intersect in exactly one line.

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Postulate 1-3-If two distinct planes intersect, they intersect in exactly one line.

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Parallel Lines-two lines in the same plane that are at equal distance from each other and never meet. 

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Parallel Lines-two lines in the same plane that are at equal distance from each other and never meet. 

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Postulate 1-2-If two distinct lines intersect, then they intersect in exactly one point.

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Postulate 1-2-If two distinct lines intersect, then they intersect in exactly one point.

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Line Segment-is bounded by two distinct points on a line

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Line Segment-is bounded by two distinct points on a line

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Line-is an infinitely long object with no width, depth, or curvature.

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Line-is an infinitely long object with no width, depth, or curvature.

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Collinear Points- are the points that lie on the same straight line or in a single line.

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Collinear Points- are the points that lie on the same straight line or in a single line.

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Coplanar Points- are three or more points which all lie in the same plane.

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Coplanar Points- are three or more points which all lie in the same plane.

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point-A point is defined as a location in any space and is represented by a dot 

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point-A point is defined as a location in any space and is represented by a dot 

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plane-a plane is a flat surface that extends into infinity. It is also known as a two-dimensional surface. 

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plane-a plane is a flat surface that extends into infinity. It is also known as a two-dimensional surface. 