r=4/7
π=22/7
Pole koła P=πr²=π·(4/7)²=16/49 π=16/49·22/7=352/343≈1,026 ≈ 1 [j²]
P=πr²
P=π(4/7)²
P=π*16/49
π=3,14
P=16/49*3,14
P≈1,03 jednostek²
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r=4/7
π=22/7
Pole koła P=πr²=π·(4/7)²=16/49 π=16/49·22/7=352/343≈1,026 ≈ 1 [j²]
P=πr²
P=π(4/7)²
P=π*16/49
π=3,14
P=16/49*3,14
P≈1,03 jednostek²