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# 3rd TAKS Math Vocab

### Vocabulary Terms for 3rd Grade Math

How do I find the peRIMeter of a shape? Measure the OUTSIDE of each side of the shape and total all of these measurements.
Congruent Two shapes having the SAME SIZE and SAME SHAPE.
Hexagon A polygon that has six sides
place value The value given to a digit by its place in a number.
symmetry An object has line symmetry if one side is the MIRROR image of the other side.
octagon a polygon that has eight sides
polygon A closed plane figure formed using line segments that meet only at their endpoints.
array an arrangement of objects in rows and columns
area The number of square units needed to cover the INSIDE of a region or plane figure.
Round To change the value of a number to one that is easier to work with. About, estimate
Division Repeated Subtraction
acute angle an angle that is greater than 0 degrees, but less than 90 degrees.
right angle an angle that is exactly 90 degrees
obtuse an angle that is more than 90 degrees,but less than 180 degrees.
probability the likelihood that an event will occur
straight angle an angle that is exactly 180 degrees. A straight set of points that extend in opposite directions without ending.
parallel lines two or more lines that have no points in common, i.e. they do not cross at any point.
parallelogram A quadrilateral with four sides in which each pair of opposite sides are parallel and equal in length.
digit a symbol used to write numbers
expanded notation a way of writing a number that shows the sum of the value of the digits
equal to having the same value
standard form the usual way of writing a number that shows only its digits, no words
pattern a series of numbers of figures that follows a rule
array Objects or symbols displayed in rows of the same length and columns of the same length. The length of a row might be different from the length of a column.
pentagon a polygon with five sides
pictograph A graph that compares data by using picture symbols.
bar graph A graph that compares data by using bars of different lengths or heights to show the values.
capacity The amount a container can hold, measured in units of dry or liquid measure.
volume The number of cubic units needed to fill a 3-dimensional figure or solid figure.
vertex (vertices) A POINT(s) of a 2- or 3-dimensional figure where two or more edges of the figure meet
edge The LINE segment where two faces of a solid figure MEET.
estimate A number close to an exact value. An estimate indicates about how much.
even number A number that ends with 0, 2, 4, 6, or 8.
cylinder A 3-dimensional figure having two circular bases and a curved surface connecting the two bases.
ordered pair A pair of numbers that gives the location of a point on a map or grid.
trapezoid A quadrilateral with exactly one pair of parallel sides.
square A rectangle with four congruent sides.
sphere A 3-dimensional figure that has the shape of a round ball.
rectangle A quadrilateral with four right angles; opposite sides are equal and parallel.
rhombus A parallelogram with four sides of the same length.
quarter hour One-fourth of an hour or 15 minutes.
fraction A number that represents part of a whole or part of a set.
odd number A number that is not divisible by 2, such a number has 1, 3, 5, 7, or 9 in the ones place.
numerator The number above the bar in a fraction; the part of the fraction that tells how many of the equal parts are being used.
denominator The bottom number in a fraction. This number represents the TOTAL PARTS.
factor A number that divides a whole number evenly. Also a number that is multiplied by another number.
equivalent having the same value
face The FLAT PART of a 3-dimensional figure. Example: A square is a face of a cube.
Created by: ssfeduccia