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zad1
a)h=10
x=5 i y=12
Pp=1/2xy=1/2·5·12=30cm²
5²+12²=c²
25+144=c²
c=√169=13cm
Pb=xh+yh+ch=5·10+12·10+13·10=50+120+130=300cm²
Pc=2Pp+Pb=2·30+300=360cm²
b)
a=8
b=6
h=5
H=10
Pp=bh=6·5=30cm²
Pb=2aH+2bH=2·8·10+2·6·10=160+120=280cm²
Pc=2·30+280=60+280=340cm²
c)a=2cm
b=6cm
krotsze ramie to h=3cm
x=b-a=6-2=4cm
4²+3²=x²
16+9=x²
x=√25=5cm---->ramie dluzsze trapezu
Pp=1/2(a+b)h=1/2(2+6)·3=1/2·8·3=12cm²
Pb=aH+bH+hH+xH=2·10+6·10+3·10+5·10=20+60+30+50=160cm²
Pc=2Pp+Pb=2·12+160=24+160=184cm²
zad2
a)H=8cm
a=4cm
Pp=a²√3/4=4²√3/4=16√3/4=4√3cm²
Pb=3aH=3·4·8=96cm²
Pc=2·4√3+96=8√3+96=8(√3+12)cm²
b)a=5cm
h=8cm
Pp=3a²√3/2=3·5²√3/2=75√3/2
Pb=6ah=6·5·8=240cm²
Pc=2·75√3/2 +240=75√3 +240=15(5√3+16)cm²
c)przekatna dluzsza podstawy d=12cm
H=8cm
d=2a
12=2a /;2
a=6cm--->dl,kraw,podstawy
Pp=3a²√3/2=(3·6²√3)/2=108√3/2=54√3 cm²
Pb=6aH=6·6·8=288cm²
Pc=2·54√3+288=108√3+288=36(3√3+8)cm²
d)d=10
a√2=10
a=10/√2=5√2
Pp=a²=(5√2)²=50cm²
Pb=4ah=4·5√2·8=160√2 cm²
Pc=2·50+160=100+160√2 =20(5+8√2)cm²
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zad1
a)h=10
x=5 i y=12
Pp=1/2xy=1/2·5·12=30cm²
5²+12²=c²
25+144=c²
c=√169=13cm
Pb=xh+yh+ch=5·10+12·10+13·10=50+120+130=300cm²
Pc=2Pp+Pb=2·30+300=360cm²
b)
a=8
b=6
h=5
H=10
Pp=bh=6·5=30cm²
Pb=2aH+2bH=2·8·10+2·6·10=160+120=280cm²
Pc=2·30+280=60+280=340cm²
c)a=2cm
b=6cm
krotsze ramie to h=3cm
H=10
x=b-a=6-2=4cm
4²+3²=x²
16+9=x²
x=√25=5cm---->ramie dluzsze trapezu
Pp=1/2(a+b)h=1/2(2+6)·3=1/2·8·3=12cm²
Pb=aH+bH+hH+xH=2·10+6·10+3·10+5·10=20+60+30+50=160cm²
Pc=2Pp+Pb=2·12+160=24+160=184cm²
zad2
a)H=8cm
a=4cm
Pp=a²√3/4=4²√3/4=16√3/4=4√3cm²
Pb=3aH=3·4·8=96cm²
Pc=2·4√3+96=8√3+96=8(√3+12)cm²
b)a=5cm
h=8cm
Pp=3a²√3/2=3·5²√3/2=75√3/2
Pb=6ah=6·5·8=240cm²
Pc=2·75√3/2 +240=75√3 +240=15(5√3+16)cm²
c)przekatna dluzsza podstawy d=12cm
H=8cm
d=2a
12=2a /;2
a=6cm--->dl,kraw,podstawy
Pp=3a²√3/2=(3·6²√3)/2=108√3/2=54√3 cm²
Pb=6aH=6·6·8=288cm²
Pc=2·54√3+288=108√3+288=36(3√3+8)cm²
d)d=10
h=8cm
a√2=10
a=10/√2=5√2
Pp=a²=(5√2)²=50cm²
Pb=4ah=4·5√2·8=160√2 cm²
Pc=2·50+160=100+160√2 =20(5+8√2)cm²