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# Set 1

### Math Vocabulary

TermDefinition
acute triangle a triangle in which each of the three angles is acute (less than 90 degrees)
additive pattern a pattern that occurs when the same value is added to each input to determine the output or y = x + a
area the number of square units inside a closed 2D space
congruent of equal measure; having the same size and same shape
decagon polygon with ten sides and ten angles
denominator the part of a fraction below the bar that tells how many equal parts there are
difference the part remaining in subtraction
equilateral triangle a special isosceles triangle with three equal sides and 3 acute 60 degree angles
heptagon polygon with seven sides and seven angles
hexagon polygon with six sides and six angles
inverse operations opposite operations, or ones that undo each other such as addition and subtraction or multiplication and division
isosceles triangle a triangle with at least two congruent sides, with all acute, one obtuse, or one right angle
multiplicative pattern a pattern that occurs when the same value is multiplied by an input to determine the output or y = ax
nonagon polygon with nine sides and nine angles
numerator the part of a fraction above the bar that tells the number of fractional pieces being used
obtuse triangle a triangle that has one obtuse angle (greater than 90 degrees) and two acute angles
octagon polygon with eight sides and eight angles
ordered pairs a pair of numbers used to locate a point on a coordinate plane (x , y)
parallel lines lines in the same plane that do not cross each other; they stay the same distance apart
parallelogram a quadrilateral where opposite sides are parallel and congruent
perimeter a linear measurement around the outer edge of a figure
pentagon polygon with five sides and five angles
perpendicular lines lines that intersect at right angles to each other to form square corners
polygon a closed plane figure formed by three or more line segments (no curves)
product the total when two or more factors are multiplied
quadrilateral polygon with four sides and four angles
rectangle a quadrilateral that is a parallelogram and has four right angles
regular polygon polygon with all sides and all angles congruent
rhombus a quadrilateral that is a parallelogram and has four congruent sides
right triangle a triangle with one right angle (exactly 90 degrees) and two acute angles
scalene triangle a triangle with no congruent sides, with all acute, one obtuse, or one right angle
square a quadrilateral that is a parallelogram and has four right angles (rectangle) and four congruent sides (rhombus)
trapezoid a quadrilateral that only has one pair of parallel sides
triangle polygon with three sides and three angles
x - coordinate the first number in an ordered pair; it tells how far left or right to move from (0, 0)
y - coordinate the second number in an ordered pair; it tells how far up or down to move from (0, 0)
Created by: MicheleDavis
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