Tolong bantu kak

<p>Diketahui &nbsp;: Keliling alas = K = 132cm</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; garis pelukis kerucut= s = 35cm</p><p>Ditanya : L permukaan kerucut?&nbsp;</p><p>Jawab :&nbsp;</p><p>Alas kerucut berbentuk lingkaran</p><p>K lingkaran = 2 x π x r</p><p>132 = 2 x 22/7 x r</p><p>132 = 44/7 x r</p><p>r = 132 : 44/7</p><p>&nbsp; &nbsp; = 132 x 7/44</p><p>&nbsp; &nbsp;= 924 / 44</p><p>&nbsp; &nbsp;r = 21 cm</p><p>L permukaan kerucut = π x r x ( r + s )&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 22/7 x 21 x ( 21 + 35 )&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 66 x 56</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 3.696 cm²</p><p>Diketahui &nbsp;: Keliling alas = K = 132cm</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; garis pelukis kerucut= s = 35cm</p><p>Ditanya : L permukaan kerucut?&nbsp;</p><p>Jawab :&nbsp;</p><p>Alas kerucut berbentuk lingkaran</p><p>K lingkaran = 2 x π x r</p><p>132 = 2 x 22/7 x r</p><p>132 = 44/7 x r</p><p>r = 132 : 44/7</p><p>&nbsp; &nbsp; = 132 x 7/44</p><p>&nbsp; &nbsp;= 924 / 44</p><p>&nbsp; &nbsp;r = 21 cm</p><p>L permukaan kerucut = π x r x ( r + s )&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 22/7 x 21 x ( 21 + 35 )&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 66 x 56</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 3.696 cm²</p><p>&nbsp;</p>