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P=0,5*2/2=0,5m2
2.P=12*12/2=72cm2
3.P=6*3/2=9cm2
1)
h=50cm=0,5m
P=1/2*2*0,5=0,5 m²
2)
P=1/2*12*12=72 cm²
3)
P= 1/2*6*3=9 cm²
2 m = 200 cm
P= 50cm x 200 cm :2= 10 000 cm :2= 5000 cm²
2. P= 12 cm x 12 cm :2= 144:2= 72 cm²
3.
6 cm x 3 cm :2= 18 cm :2= 6 cm²