Question

Tolong dijawab pakai cara:)
Terima Kasih^^

Answer 1

R = 15 cm (garis pelukis)
sudut pusat = 288°

panjang busur AB = keliling alas lingkaran

panjang busur AB = x/360 × 2 × π × r
AB = 288/360 × 2 × π × 15
AB = 24π

K alas lingkaran = 2 × π × r
24 π = 2 π r
r = 24π / 2π
r = 12 cm

s = 15 cm
r = 12 cm

t² = s² - r²
t² = 15² - 12²
t² = 225 - 144
t² = 81
t = √81
t = 9 cm

jadi tinggi kerucut adalah 9 cm. (B)