Latitude, Line, Length....

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Here is a handy selection of Math words that start with L. Teach the parts of the words so that the kids can understand other related words with less effort.

If kids know that terms like latitude, least, and line mean relatively the same thing as in every day life, they make the connection better for Math class.

**L-Tetromino** - a tetromino is the shape of the letter L.

**Latera Recta** - plural of lattice rectum, which see.

**Latin Square** - an n X n array of numbers in which only n numbers appear. No number appears more than once in any row or column.

**Latitude** - the angular distance of a point on the Earth from the equator, measured along the meridian through that point.

**Lattice Point** - a point with integer coordinates.

**Latus Rectum** - a chord of an ellipse passing through a focus and perpendicular to the major axis of the ellipse. Plural: latera recta.

**Leap Year** - a year with 366 days, occurs every four years.

**Hint:** Many of the words on this page mean for Math what they mean for other uses as with Latin, leap, least, length, and less. So many times this can make Math word problems easier to understand if you simply encourage your students that they already know so many of these words.

**Least Common Denominator** - (LCD) least common multiple of the denominators of two or more fractions.

**Least Common Denominator** - the smallest number that can be used as the common denominator for a group of fractions.

**Least Common Multiple (LCM)** - the least common multiple of a set of integers is the smallest integer that is an exact multiple of every number in the set.

**Least Upper Bound** - the least upper bound of a set of numbers is the smallest number that is larger than every member of the set.

**Legend** - a notation on a map, graph, or diagram that describes the meaning of the symbols and or the scale used; list.

**Legs of a right triangle** - the two sides that are not the hypotenuse. The legs are the two sides that are on either side of the right (90 degree) angle.

**Lemata** - plural of lemma.

**Lemma** - a proposition that is useful mainly for the proof of some other theorem.

**Length** - the straight line distance between two points.

**Less Than** - having the smaller value than.

**Like term**s - Mathematical expressions containing the same letters, 5ab and 8ab.

**Line** - may be considered as the distance between two points, and is represented by joining the two points.

**Line Graph** - a diagram showing a system of connections or interrelations between two or more things by using lines.

**Line of Best Fit** - a straight line used as a best approximation of a summary of all the points in a scatter-plot. The position and slope of the line are determined by the amount of correlation between the two, paired variables involved in generating the scatter-plot. This line can be used to make predictions about the value of one of the paired variables if only the other value in the pair is known.

**Line Segment** - a piece of a line with endpoints at both ends.

**Line Symmetry** - If a figure is divided by a line and both divisions are mirrors of each other, the figure has line symmetry. The line that divides the figure is the line of symmetry.

**Linear** - an equation or graph is linear if the graph of an equation is a straight line.

**Linear Function** - a function of the form f(x) = mx + b where m and b are some fixed numbers. The names “m” and “b” are traditional. Functions of this kind are called “linear” because their graphs are straight lines.

**Linear Regression** - an attempt to model the relationship between two variables by fitting a linear equation to observed data. One variable is considered as the independent variable, and the other is considered as the dependent variable.

**Locus** - the set of all points meeting some specified condition.

**Logarithm** - the exponent of the power to which a base number must be raised to equal a given number.

**Logic** - the study of the formal laws of reasoning.

**Lowest Common Denominator** - the smallest number that is exactly divisible by each denominator of a set of fractions.

**Lowest Terms** - a fraction in which the numerator and denominator have no common factor.

**Loxodrome** - on a sphere, a curve that cuts all parallels under the same angle.

**Lucas Number** - a member of the sequence 2, 1, 3, 4, 7,... where each number is the sum of the previous two numbers. L0=2, L1=1, Ln=Ln-1+Ln-2.

**Lune** - the portion of a sphere between two great semicircles having common endpoints (including the semicircles).

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