Lp = 18,84 m²
(d) Luas permukaan kerucut
r = √15² - 12²
r = √225 - 144
r = √81 = 9 cm
Lp = πr(r + s)
Lp = 3,14 × 9 cm × (9 cm + 15 cm)
Lp = 28,26 cm × (24 cm)
Lp = 18,84 m²
(d) Luas permukaan kerucut
r = √15² - 12²
r = √225 - 144
r = √81 = 9 cm
Lp = πr(r + s)
Lp = 3,14 × 9 cm × (9 cm + 15 cm)
Lp = 28,26 cm × (24 cm)
Editor: Moch. Kharisson Abdillah
Sumber: Buku Kemdikbud