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a²=400
a=√400
a=20(j)
b) P=a²
a²=0,81
a=√0,81
a=0,9(m)
Prosze o naj :)
a =?
400 : 4 =100
2.
pole= 0,81
a =?
0, 81 :4= 0,2025
bok- 400m²:4-bo kwadrat ma 4 równe boki
bok=100m
b )
bok- 0,81m²:4
bok= 0,20m