**Construction –**a drawing using only two tools a compass and a straight edge**Segment –**a part of a line that has two endpoints**Bisect –**to divide into 2 equal parts**Midpoint –**a point that divides a segment into two equal, or congruent, parts**Congruent –**same measure or length**Segment Bisector –**a line, segment, or ray that goes through the midpoint of a segment**Radius –**the distance from the center to the side of a circle**Ray –**A ray begins at a point and goes on forever in one direction**Angle –**Region between two rays or the amount of rotation about a fixed point**Vertex –**the common endpoint of the two rays that serve as the sides of an angle.**Perpendicular Lines –**two lines that intersect to form a right angle.**Perpendicular Bisector –**A perpendicular line or segment that passes through the midpoint of a segment.**Point –**a location in space**Parallel Lines –**Two lines are parallel if they lie in the same plane and they do not intersect.**Coordinate Plane –**A two-dimensional region determined by a pair of axes and that uses numerical values to represent the location of an object.**X-Axis –**The horizontal number line on the Cartesian coordinate plane.**Y-Axis –**The vertical number line on the Cartesian coordinate plane.**Origin –**the point of intersection of the vertical and horizontal axes of a coordinate plane**Quadrant –**One of the four regions on a Coordinate plane formed by the intersection of the x-axis and the y-axis.**Ordered Pair –**A pair of numbers, (x, y), that indicate the position of a point on a Cartesian plane.**Coordinate –**An ordered pair, (x,y), that locates a point in the plane.**Transformation –**The mapping, or movement, of all the points of a figure in a plane according to a common operation.**Translation –**a transformation that “slides” each point of a figure the same distance in the same direction.**Rotation –**A transformation that turns a figure about a fixed point at a given angle and a given direction.**Reflection –**A transformation that “flips” a figure over a mirror or reflection line.**Dilation –**A transformation that changes the size of an object, but not the shape.**Pre-Image –**the original figure before any transformations have taken place**Image –**The result of a transformation.**Cross Section –**the intersection of a three-dimensional figure with a plane**Ratio –**A comparison of two quantities that have the same unit of measure.**Similar Figures –**Figures that have the same shape but not necessarily the same size.**Congruent Figures –**Figures that have the same shape and are the same size.**Scale Factor –**The ratio of corresponding lengths of the sides of two similar figures.

You don’t need to draw the ones below.

**Angle**– two segments that share a common endpoint.**CAD –**Computer-Aided Design**Freehand**– without the aid of any tool.**Parallelogram**– Four sides, opposite sides equal, non-right angles**Proportion –**Two or more equal ratios.**Ratio –**Compare two numbers using division**Rectangle**– Four sides, right angles, opposite sides equal**Rhombus**– Four equal sides, non-right angles**Segment**– portion of a line that begins and ends.**Square**– Four sided figure, right angles, equal sides**Triangle**– Three sided figure**Vertex**– point of angle where the 2 segments meet

From Georgia Virtual Learning