Oblicz pole zakreskowanej figury:
1.
P=cd
c=a-2*1,5
c=7-3
c=4 m
d=b-2*1,5
d=5-3
d=2 m
P=4*2
P=8 m²
2.
P=a²
d=4 3/4=a√2
a√2=4 3/4
a√2=19/4
a=19/4√2
a=19√2/8 cm
P=(19√2/8)²
P=361*2/64
P=361/32 cm²≈11,3 cm²
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1.
P=cd
c=a-2*1,5
c=7-3
c=4 m
d=b-2*1,5
d=5-3
d=2 m
P=4*2
P=8 m²
2.
P=a²
d=4 3/4=a√2
a√2=4 3/4
a√2=19/4
a=19/4√2
a=19√2/8 cm
P=(19√2/8)²
P=361*2/64
P=361/32 cm²≈11,3 cm²