Pakai rumusnya Tolong

<p>Jawaban &nbsp;<strong>125,6 cm²</strong></p><p>&nbsp;</p><p><strong>Pembahasan&nbsp;</strong></p><p>Luas arsiran = ½πr₁² - ½πr₂²</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = ½.3,14. (12² - 8²)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 1,57. (144 - 64)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 125,6 cm²</p><p>&nbsp;</p><p>&nbsp;</p>