a)
a = 0,9 dm = 9 cm
b = 9cm + 31 cm = 40 cm
c = ?
c² = a²+b²
c² = 9²+40²
c² = 81+1600
c² = 1681
c = √1681
c = 41 cm
b)
a = 80 mm
b = 80-25%*80 = 80-0,25*80 = 80-20 = 60 mm
c = a²+b²
c² = 80²+60²
c² = 6400+3600
c² = 10000
c = √10000
c = 100 mm
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a)
a = 0,9 dm = 9 cm
b = 9cm + 31 cm = 40 cm
c = ?
c² = a²+b²
c² = 9²+40²
c² = 81+1600
c² = 1681
c = √1681
c = 41 cm
b)
a = 80 mm
b = 80-25%*80 = 80-0,25*80 = 80-20 = 60 mm
c = a²+b²
c² = 80²+60²
c² = 6400+3600
c² = 10000
c = √10000
c = 100 mm
a=0,9dm=9cm---------przyprostokatna
b=9+31=40cm--------przyprostokatna
c=?-----------------------przeciwprostokatna
a²+b²=c²
9²+40²=c²
81+1600=c²
c²=1600
c=√1600
c=41cm
b)
a=80mm=8cm----------------------przyprostokatna
100%-25%=75%
b=75% z 8cm=0,75*8=6cm--------przyprostokatna
c=?----------------------------------przeciwprostokatna
a²+b²=c²
8²+6²=c²
64+36=c²
c²=100
c=√100
c=10cm