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# 3rd Quarter Vocab..6

Variable a letter used to represent an unknown number The value can vary (change).
x-axis the horizontal axis on a coordinate grid
y-axis the vertical axis on a coordinate grid
Origin the point (0,0) where the x-axis and y-axis intersect (meet)
Triangle a polygon with 3 sides and 3 angles
Quadrilateral a polygon with 4 sides and 4 angles
180 degrees the sum of the angles in a triangle
Acute angle an angle that measures less than 90 degrees
Obtuse angle an angle that measures more than 90 degrees
Scalene triangle a triangle with no sides equal and no angles equal
Isosceles triangle a triangle with 2 sides equal and 2 angles equal
Equilateral triangle a triangle with all 3 sides and 3 angles equal
Area the number of square units needed to cover a region
Volume the number of cubic units needed to fill a space
Mean the average of a set of data (add, then divide)
Median the middle number in a set of data when the data is in order least to greatest
Mode the number that appears the most in a set of data
Range the difference between the highest and lowest number in a set of data (big - small)
Right angle an angle that measures exactly 90 degrees
straight angle an angle that measures exactly 180 degrees
Created by: MunsonStephanie

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