UPDATE! Kunci Jawaban Matematika Kelas 9 Semester 2 Halaman 293 sampai dengan 296 Latihan 5.2 Kerucut

L = πr (r + s)
L = 3.14 x 6 (6 + 2√34)
L = 18.84 (6 + 2√34)
L = 113.04 + 37.68√34
L = 332,75 cm²

V = 1/3 πr² t
V = 1/3 x 3,14 x 6² x 10
V = 1/3 x 3.14 x 36 x 10
V = 3.14 x 12 x 10
V = 376,8 cm³

Baca Juga: Update! Kunci Jawaban Matematika Kelas 8 Halaman 66 Semester 2, Tabel Pernyataan Unsur-Unsur Lingkaran

d. r = 7 cm, s = 25 cm

s² = r² + t²
25² = 7² + t²
t² = 25² – 7²
t² = 625 – 49
t² = 576
t = √576
t = 24 cm

L = πr (r + s)
L = 3.14 x 7 (7 + 25)
L = 21.98 x 32
L = 703,36 cm²

V = 1/3 πr² t
V = 1/3 x 3,14 x 7² x 24
V = 1/3 x 3.14 x 49 x 24
V = 3.14 x 49 x 8
V = 1230,88 cm³

e. t = 3 cm, s = 4 cm

s² = r² + t²
4² = r² + 3²
16 = r² + 9
r² = 16 – 9
r² = 7
r = √7

L = πr (r + s)
L = 3.14 x √7 (√7 + 4)
L = 3.14√7 (√7 + 4)
L = 3.14 x 7 + 12.56√7
L = 21.98 + 33.22
L = 55,2 cm²