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1° 10+6+2.5+2.5=21 cm
2° 10+10+10+10+10=50 cm
3° 4+4+4+4+4+4=24 cm
Área
1° ?
2° 10×8÷2=40cm2+40+40 +40+40=200cm2
3° 3.5×4÷2=14cm2+14+14
+14+14+14=84cm2