" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
b=2 bok
2a+2b=80/:2
a+b=40
a+8=b-10
a=40-b
40-b-b=-8-10
-2b=-18-40
-2b=-58
b=58:2
b=29cm
a=40-29=11cm
pole prostokąta=ab=29×11=319cm²
bok kwadratu=a+8=11+8=19cm
pole kwadratu=a²=19²=361cm²
P=a²
P=20cm²=400cm² - pole kwadratu
P=a×b -pole prostokąta
a=20cm+10cm=30cm
b=20cm-8cm=12cm
P=a×b
P=12cm×30cm=360cm²