a sequence - increase or decrease by the same amount, a multiple, symbol, equivalent - the same as, factor, area , perimeter, right angle , acute angle, obtuse angle , isosceles triangle, tetrahedron, edge (edges) of a 3D shape , face (faces) of a 3D shape , vertex (vertices) of a 3 D shape , difference, pictogram, row, column, fraction, to round, to estimate, whole of something, whole of an amount, perimeter calculation, ascending order, descending order, rectilinear shape, addition, subtraction,

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