··r = 1/2 . d
= 1/2 . 10 cm
= 5 cm
· s² = r²+t²
= 5² + 12²
= 25 + 144
=√169
= 13 cm
·· garis pelukis = jari jari selimut
panjang = keliling alas
luas selimut = π . r . s
= 3,14 . 5 . 13
= 204,1 cm²
··· luas permukaan : π . r(r+s)
= 3,14 . 5(5+13)
= 3,14 . 5 . 18
= 282,6 cm²
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··
r = 1/2 . d
= 1/2 . 10 cm
= 5 cm
· s² = r²+t²
= 5² + 12²
= 25 + 144
=√169
= 13 cm
·· garis pelukis = jari jari selimut
panjang = keliling alas
luas selimut = π . r . s
= 3,14 . 5 . 13
= 204,1 cm²
··· luas permukaan : π . r(r+s)
= 3,14 . 5(5+13)
= 3,14 . 5 . 18
= 282,6 cm²