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Published bySavannah Harrington Modified over 3 years ago

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parallelogramma rettangolo rombo triangolo quadrato

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Area del rettangolo AB C D A = b * h b = A / h h = A / b Esempi AB = 30 cm AD = 15 cm A = 30 * 15 = 450 cm A = 690 cm AD = 20 cm AB = A / AD = 48 cm A = 300 cm AB = 10 cm AD = 300 / 10 = 30 cm

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Area dal quadrato A = l * l = l^2 l =A Esempi L = 39 cm A = 39 * 39 = 1521 cm A = 3600 cm L = 3600 = 60 cm A B C D

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Area del parallelogramma AB CD A = b * h b = A / h h = A / b Esempi AB = 9 cm BC =15 cm A = 9 * 15 = 135 cm BC = 30 cm A = 189 cm AB = 189 / 30 = 6,3 cm A = 80 cm AB = 4 cm BC = 80 / 4 = 20 cm

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Area del rombo Esempi A B C D A = d1 * d2 /2 d1 d2 d1 = A * 2 / d2 d2 = A * 2 / d1 AC = 15 cm DB = 20 cm A = AC * DB /2 = 150 A = 400 DB=10 AC = A * 2 / DB = 80 A = 200 AC = 20 DB = A * 2 / AC =20

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A B C Area del triangolo A = b * h / 2 Esempi b = 2A / h h = 2A / b H AB = 15 CH = 25 A = 15 * 25 / 2 = 187,5 A = 55 CH = 10 AB = 55 * 2 / 10 = 11 A = 100 AB = 10 CH = 98 * 2 / 18

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Number bonds to 10, 20 + 100.

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