Diameter alas kerucut = 16 cm Panjang garis pelukisnya = 17 cm Hitung Luas dan volume kerucut ! (π = 3.14)

BANGUN RUANG
MATEMATIKA SMP

Cari Tinggi Kerucut
= √(17² - 8²)
= √(289 - 64)
= √ 225
= 15 cm

Volume Kerucut
= ⅓ x π x r² x t
= ⅓ x 3,14 x 8² x 15
= 3,14 x 64 x 5
= 1004,8 cm³ <=======

Luas Kerucut
= πr² + πrs
= (3,14 x 8²) + (3,14 x 8 x 17)
= 200,96 + 427,04
= 628 cm² <<=======

Semoga Bermanfaat\(^-^)/
Senang Bisa Membantu <^=^>

d = 16 cm
r = 1/2 × d
r = 1/2 × 16 = 8 cm
s = 17 cm
phi = 3,14
t^2 = s^2 - r^2
= 17^2 - 8^2
= 289 - 64
= 225
t = akar 225
t = 15 cm

L = La + Lselimut
= (phi × r^2) + (phi × r × s)
= (3,14 × 8 × 8) + (3,14 × 8 × 17)
= 200,96 + 427,04
= 628 cm^2
V = 1/3 × La × t
= 1/3 × phi × r^2 × t
= 1/3 × 3,14 × 8 × 8 × 15
= 1004,8 cm^3