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P= 1/2 (7+12) * 4
P= 38
P= 1/2 (a+b) * h
P= 1/2 (6+10) * 8
P= 64
½ x [a + b] x h
½ × [7+12] x 4 = ½ x 19 x 4 = ½ x 76 = 38
2]
½ x [6 + 10] x 6 = ½ x 16 x 6 = 8 x 6 = 48
nie jestem pewna tego 2 ale chyba dobrze. ;]