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Unit 2 Vocabulary Pre-work

Across
A flat shape with 4 straight sides where opposite sides are parallel and equal in length.
a pair of angles formed when two lines intersect, where the angles are directly opposite each other and share the same vertex
The line that divides something into two equal parts at a 90° or right angle.
a flat, two-dimensional area enclosed by a simple closed curve within a plane
The part of a line that connects two points. It is the shortest distance between the two points.
When two lines are crossed by another line (called the Transversal) creating a pair of angles on the inner side of each of those two lines but on opposite sides of the Transversal
When two lines are crossed by another line (called the Transversal) creating angles in matching corners.
a logical argument that uses known facts, definitions, postulates, and theorems to demonstrate the truth of a given statement
a closed 2-D shape, having 4 sides, 4 corners, and 4 right angles (90°); opposite sides are equal and parallel
a two dimensional flat surface that extends into infinity
An instrument with two arms one sharp and one with a pencil that can be used to draw circles or arcs.
a part of a line that has one fixed endpoint and extends infinitely in one direction
Down
a statement that can be proven to be true based on known facts and axioms
When two lines are crossed by another line (called the Transversal) creating a pair of angles on the outer side of each of those two lines but on opposite sides of the Transversal
The middle of. The point halfway along a segment.
A straight object or direction with no end on both sides.
Algebraic expression that gives the distances between pairs of points in terms of their coordinates
To draw a shape line or angle accurately using a compass and straightedge (ruler). Sometimes you are also allowed to use a protractor and triangle.
A line that splits an angle into two equal angles.
a semicircular geometry tool divided into 180 equal parts, each measuring 1°
a pair of adjacent angles that form a straight line when two lines intersect
a location or position represented by a dot and is notated by one letter, such as "W"