S=a²
225=a²
a=15 дм
P=a*4=15*4=60 дм
S=225
S=aa
a=√225
P=4a
P=4*15=60дм
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S=a²
225=a²
a=15 дм
P=a*4=15*4=60 дм
S=225
S=aa
a=√225
a=15 дм
P=4a
P=4*15=60дм