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a=4cm
b=4cm
Obwód=4√2cm+4cm+4cm=8cm+4√2cm
2. x-długość podstawy
x+x+6+x+6=36
3x=24
x=8
4²+h²=14²
16+h²=196
h²=180
h=6√5cm
3. d=18cm
2a=18
a=9cm
b=9√3cm
Obwód=2*9cm+2*9√3cm=18cm+18√3cm