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# Math STAAR Part 2

### words for the 5th math STAAR

Prime factorization factors of a number that are all prime
Prime numbers numbers that only have one and itself as factors
Factors numbers that divide into a whole number with no remainder
GCF greatest common factor
Improper Fraction a fraction with a numerator larger than the denominator. Simplify!
Reflection mirror image of a figure
Rotation move around (like in “four square” game)
Translation slide (horizontally, vertically, or diagonally)
Line of Symmetry a line that divides a figure into two mirror images
Congruent shapes having the same size and same shape
Prism A 3D solid with two congruent bases
Circumference the distance around a circle
Diameter the distance across the middle of the circle
Radius Half the diameter
Equation a number sentence using an equal sign
Pyramid a 3D solid with a polygon as its base and triangular faces that meet at the top
Acute angle angle that is less than a right angle (less than 90 degrees)
Obtuse angle angle that is more than a right angle (greater than 90 degrees)
Right angle square angle (equal to 90 degrees)
Perpendicular lines lines that cross and form a right angle
Parallel lines lines that do not cross each other, they stay the same distance apart
Whole numbers 0, 1, 2, 3, 4, 5........
Average The answer when numbers are added and then divided by the number of addends