Pole trapezu: 1/2 * (a+b) * h = 1/2 * (6 3/4 + 13 1/4) * 4,5=
(6 3/4 + 13 1/4) / 2 *4,5= 20 / 2 * 4,5= 10 *4,5 = 45
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(6 3/4 + 13 1/4) / 2 *4,5= 20 / 2 * 4,5= 10 *4,5 = 45