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Sixth grade math book book 2
40 pages (1) acute angle (2) 60, 150 (3) right angle (4)90, isosceles (5) rectangle, parallelogram, square (7)

Page 4 1 (1) 24 (2) 2460 (3)1103.4cm (4) 78.5% 63.7% (5) 314 (6)

C = 12+ 15+9 = 36s = ah÷2 = 9× 12÷2 = 54c =(2.4+ 1.8)×2 = 8.4s = ah = 2.4× 1.5 = 3.6

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