Habisin poin O-o Terlampir! ​

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Habisin poin O-o Terlampir! ​

Habisin poin O-o Terlampir! ​

sebuah kerucut berjari-jari 11 cm dan panjang garis pelukis (s) 15 cm, tentukan

(a) luas selimut kerucut

= πrs

= 3,14 × 11 × 15

= 34,54 × 15

= 518,1 cm

(b) luas permukaan kerucut

= πr(s + r)

= 3,14 × 11 × (15 + 11)

= 3,14 × 11 × 26

= 34,54 × 26

= 898,04 cm²

  • luas selimut = πrs
  • luas selimut = 3,14 × 11 × 15
  • luas selimut = 518,1 cm²

  • LP kerucut = πr ( r + s )
  • Lp kerucut = 3,14 × 11 ( 11 + 15 )
  • Lp kerucut = 34,54 ( 26 )
  • Lp kerucut = 898,04 cm²

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