1) 15 a) square b) triangular 2) 4 a) square b) triangular 3) 10 a) triangular b) square 4) 9 a) triangular b) square 5) 1 a) triangular b) composite c) square d) prime 6) 25 a) square b) triangular 7) 81 a) triangular b) square 8) 21 a) triangular b) square 9) 19 a) prime b) composite 10) 2 a) prime b) composite

Math grade 4 Cambridge

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