Saxon Math Course 2 Glossary Words
Chord
A segment whose end points lie on a circle.
Alternate Exterior Angles
A special pair of angles formed when a transversal intersects 2 lines. Alternate exterior angles lie on opposite sides of the transversal and are outside the 2 intersected lines.
Alternate Interior Angles
A special pair of angles formed when a transversal intersects 2 lines. Alternate exterior angles lie on opposite sides of the transversal and are outside the 2 intersected lines.
Compass
A tool used to draw circles and arcs.
Acute Triangle
A triangle whose largest angle measures less than 90°
Chance
A way of expressing the likelihood of an event; the probability of an event expressed as a percent. Ex. The CHANCE of snow is 10%. It is not likely to snow There is an 80% chance of rain. It is likely to rain.
Commutative Property of Addition
Changing the order of addends does not change their sum. In symbolic form, a + b = b + a. Unlike addition, subtraction is not commutative.
Commutative Property of Multiplication
Changing the order of factors does not change their product. In symbolic form a x b = b x a. Unlike multiplication, division is not commutative.
Average
The number found when the sum of two or more numbers is divided by the number of addends in the sum; also called mean.
Angle
The opening that is formed when 2 lines, rays, or segments intersect.
Circumference
The perimeter of a circle
Altitude
The perpendicular distance from the base of a triangle to the opposite vertex; also called height
Center
The point inside a circle or sphere from which all points on the circle or sphere are equally distant.
cancel
The process of reducing a fraction by matching equivalent factors from both the numerator and denominator. 14/28 = 1/2
Area
The size of the inside of a flat shape. Area is measured in square units.
Comparison Symbol
The symbol used to show the comparison of two numbers: greater than (>), less than (<) , or equal (=). The pointed end of the symbol points to the lesser number. For example, 4<6 and 8>4.
Arc
Part of a circle
Circle
A closed, curved shape in which all points on the shape are the same distance from its center.
Common Denominator
A common multiple of the denominators of two or more fractions. Ex. A common denominator of 5/6 and 3/8 is a common multiple of 6 and 8 such as 24, 48, and 72
Base
1. A designated side (or face) of a geometric figure. 2. The lower number in an exponential expression. Base ➡️5⬆️3 ⬅️ exponent
Angle Bisector
A line, ray, or line segment that divides an angle into two equal halves.
Box-and-whisker Plot
A method of displaying data that involves splitting the numbers into 4 groups of equal size.
Circle Graph
A method of displaying data, often used to show information about percentages or parts of a whole. A circle graph is made of a circle divided into sectors.
Acute Angle
An angle whose measure is between 0° and 90°
Central angle
An angle whose vertex is the center of a circle.
Adjacent Sides
In a polygon, two sides that intersect to form a vertex.
Coefficient
In common use, the number that multiplies the variable(s) in an algebraic term. If no number is specified, the coefficient is 1. Ex. In the term -3x, the coefficient is -3. In the term y^2, the coefficient is 1.
Compare
Looking at two numbers to find out if one number is greater than, less than, or equal to another number. This can be done using the number line.
Celsius
Method of temperature measurement where 0° is the temperature for freezing water and 100° is the temperature for boiling water.
Addend
One of two or more numbers that are added to find a sum 7 + 3 = 10 the addends are 7 and 3
Algebraic Addition
The combining of positive and negative numbers to form a sum. (-3) + (+2) + (-11) = -12
Absolute Value
The distance from the graph of a number to the number 0 on a number line. The symbol for absolute value is a vertical bar on each side of a numeral or variable. |-x| = x
Associative Property of Addition
The grouping of addends does not affect their sum. In symbolic form, a + (b + c) = (a + b) + c. Unlike addition, subtraction is not associative.
Associative Property of Multiplication
The grouping of addends does not affect their sum. In symbolic form, a x (b x c) = (a x b) x c. Unlike multiplication, division is not associative.
Additive identity
The number 0.
Bisect
To divide a segment or angle into two equal halves
Adjacent Angles
Two angles that have a common side and a common vertex. The angles lie on opposite sides of their common side.
