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a/8=1/2
a=4
a²+b²=c²
16+b²=64
b²=48
b=√48=4√3
Ob=2a+2b
Ob=8+8√3
P=ab
P=4*4√3=16√3
b)Ob=10+10+11+11=42
P=absin45
P=10*11*√2/2=55√2
c)h-wysokosc
h/6 =sin(180-120)
h/6=sin60
h/6=√3/2
h=3√3
x/h=ctg60
x=√3/3*√3/3=1/3
c-ramie
h/c=sin45
3√3=√2/2*c
c=6√(3/2)
y/h=ctg45
y=1*3√3=3√3
Ob=5+5+1/3+3√3+6+6√(3/2)=16 i 1/3 +3√3+6√(3/2)
P=(5+5+1/3+3√3)*3√3/2=31√3+27):2