sebuah stadion berbentuk lingkaran yang kelilingnya 132m.berapakah luas keseluruhan stadion tersebut?
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rumus
Keliling = 2πr/ πd
Luas = πr²
keliling stadion= 132
ditanya luas
k = 2π/r
132 = 2²²/7.r
r = 7/44. 132
r = 21
L = πr²
=22/7.21²
= 22/7.7.441
= 1386 m²
semoga membantu