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h²+2²=4²
h²=16-4
h²=12
h=2√3cm²
Pp=10+6/2 *2√3
Pp=8*2√3
Pp=16√3
Pb=10*20+4*20+4*20+6*20
Pb=480cm²
Pc=2*16√3+480
Pc=32√3+480cm²
Pc=32(√3+15)cm²