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48=½12*h
48=6h |:6
8=h
b²=h²+½a²
b²=8²+6²
b²=64+36
b²=100
b=10cm
Obw=a+2b
Obw=12+2*10
Obw=12+20=32cm
48 = 1/2 x 12 x h
48 = 6h /:6
h = 8
b² = h²+1/2 a²
b² = 8²+6²
b² = 64+36
b² = 100
b = √100
b = 10
Obw = a + 2b
Obw = 12 + 2 x 10
Obw = 12 + 20 = 32
Odp. Obwód jest równy 32 centymetry.
48 = 1/2 *12 * h
48 = 6h /:6
h = 8
b² = h²+1/2 a²
b² = 8²+6²
b² = 64+36
b² = 100
b = √100
b = 10
L= a + 2b
L = 12 + 20 = 32