Jawabanmu

2014-06-05T17:27:06+07:00
1/4 x 3,14 x 10 x 10 = 78,5 cm²
10 x 10 / 2 = 50 cm²

78,5 - 50 = 28,5 cm²

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  • nald
  • Gemar Membantu
2014-06-05T17:28:39+07:00
L = 3,14 x 10² = 314
L juring = 90/360 x 314 = 1/4 x 314 = 78,5
L segitiga = 1/2 x 10 x 10 = 50
L tembereng = 78,5 - 50 = 28,5
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