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flat surface; two-dimensional; surface extends indinitely along its length and width; a plane is named with script capital letter
consists of two points called the endpoints of the segment and all the points between them that are collinear with the two points
the point on the segment that is the same distance from both endpoints. A pair of hatch marks refer to line segments being the same length
pair of vertical angles
angles that are formed by two intersecting lines; they share a common vertex but not a common side
linear pair of angles
two angles are a ____if they share a vertex and a common side and their non-common sides form a line
closed figure in a plane, formed by connecting line segments endpoint to endpoint with each segment intersecting the other
one angle is more than 90 degrees and less than 180 degrees of a three sided polygon
top and bottom are parallel, two sides are congruent, top two angles are congruent, bottom two angles are congruent
a quadrilateral with two pairs of consecutive congruent sides. The diagonails are perpendicular
an equilateral, equilangular parallelogram; a regular quadrilateral; an equalateral rectangle
a set of all points in a plane that are the same distance from a given point (center) in a plane
a line segment passing through the center point of a circle and whose endpoints are on the edge of the circle
any line segment whose endpoints are on the edge of a circle; the diameter is the longest chord
arc of a circle
the continuous (unbroken) part of a circle that is in between two points on the edge of a circle
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