GEOMETRY GLOSSARY
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Title  Description  

Magnitude, Powers of Ten  Often when we compare the multiplication by various powers of ten we speak of the magnitude of the effect of the multiplication. 

Major Axis  Certain conic sections have a Major Axis, a line (segment) between vertices. 

Measure  A noun or verb, Measure implies comparison to an established standard. 

Measurement  The result from comparison to an established standard, Measurement may be exact only to an agreedto precision. 

Median, Trapezoid  The average of the lengths of the bases of a trapezoid. The Median is a line segment parallel to and equidistant from the bases. 

Median, Triangle  A triangle has three Medians, each a line segment from a vertex to the midpoint of the opposite side of the triangle. Medians are concurrent at the centroid. 

Midpoint  Every line segment (or side of a polygon) contains a point equidistant from the endpoints (or vertices), the Midpoint. 

Minimize  A process to establish the least extent, value, or size possible. 

Minor Axis  A line or line segment specific to certain conic sections. 

Minute, Angle  For angles, one Minute is onesixtieth of a degree. One Minute is equivalent to 1/21600 of a circular rotation. 

Mode  While Mode can take on several meanings in mathematics, it generally is used for the value of data with the greatest frequency of occurrence in a list of values. 

Modus Ponens  We have "If A, then B." Modus Ponens is a piece of logic that goes like this: if we know A to be true, then we know that B must be true, too. 

Modus Tollens  Begin with "If A, then B." That's a given. We (somehow) know that B is false. We then may infer (but not conclude) that A is false. Modus Tollens is not particularly robust; it is not entirely dependable. 

Multiplicative Inverse  Another name for Multiplicative Inverse is reciprocal. Reciprocals multiply to one. 
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