Pкв = 4a
10=4a
a=2.5см
Sкв = a² = 2,5²=6,25cм²
10 : 4 = 2.5 - сторона a
S = 2.5 · 2.5 = 6.25
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Pкв = 4a
10=4a
a=2.5см
Sкв = a² = 2,5²=6,25cм²
10 : 4 = 2.5 - сторона a
S = 2.5 · 2.5 = 6.25