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Definition
An angle that is less than 90 degrees 


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Angles that have a common vertex, but don't overlap. 


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Definition
A figure formed by two rays. 


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A line which cuts an angle into two equal halves. 


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The size of a shape's surface. 


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A proposition that is assumed without proof for the sake of studying the consequences that follow from it. 


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Definition


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Definition
Three or more points that lie in a straight line. 


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A tool used to make curved lines and circles. 


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Two angles that add up to 90 degrees 


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Angles that are exactly the same in degrees. 


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Segments that have the same length. 


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To draw shapes, angles or lines accurately. 


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How the position of a point can be defined by x and y. 


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Definition
A plane with an x and y axis. 


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Being or operating in the same plane. 


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The extent or amount of space between two things, points, lines, etc. 


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The point on each side of an interval marking its extremity on that side. 


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When one line passes through another. 


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Having equal dimensions or measurements. 


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A continuous extent of length, straight or curved, without breadth or thickness. 


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Two angles that are adjacent and supplementary. 


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The concepts of equality, sums, and differences of angles. 


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Definition
The point on a line segment or an arc that is equidistant, when measured along the line or the arc, from both endpoints. 


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Definition
The 2D pattern that creates the figure. 


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Definition
An angle that's more than 90 degrees, but less than 180 degrees. 


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Definition
Two rays with a common endpoint that form a straight line. 


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Definition
Method of showing a dimensional object in two dimensions. 


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Definition
The border or outer boundary of a twodimensional figure. 


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Definition
A line which cuts a line segment into two equal parts at 90 degrees. 


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Definition
A line is perpendicular to another if they meet at 90 degrees. 


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Definition
A surface generated by a straight line moving at a constant velocity with respect to a fixed point. 


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Definition
Exact location in a space. 


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Definition
A proposition that requires no proof, being selfevident, or that is for a specific purpose assumed true, and that is used in the proof of other. propositions 


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Definition
A line that goes on forever. 


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Definition
An angle that is 90 degrees. 


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A line linking two points. 


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A point, segment, line, or plane that divides a line segment into two equal parts. 


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The ray where measurement of an angle starts. 


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Definition
Something that has depth, width and height. 


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Definition
A straight line that is always 180 degrees. 


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Definition
A tool that can make a straight line, like a ruler. 


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Definition
Two angles that add up to 180 degrees. 


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Definition
The point about which an angle is measured. 


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Definition
One of two opposite and equal angles formed by the intersection of two lines. 

