Răspuns :
L(arc) = 16π = 2π·r => r = 8 cm
2π·r = 2π·G·288/360
16 = 2G·4/5
80 = 8G
G = 10 cm
At = Al + Ab = π·r·G + π·r²
At = 80π + 64π
At = 144π cm²
V = π·r²·h/3 = π·64·6/3 = 128·π cm³
h = √G² - r² = √100 - 64 = √36 = 6 cm
L(arc) = 16π = 2π·r => r = 8 cm
2π·r = 2π·G·288/360
16 = 2G·4/5
80 = 8G
G = 10 cm
At = Al + Ab = π·r·G + π·r²
At = 80π + 64π
At = 144π cm²
V = π·r²·h/3 = π·64·6/3 = 128·π cm³
h = √G² - r² = √100 - 64 = √36 = 6 cm