suatu kerucut diameter alasnya 16cm dan tingginya 15cm. luas selimut kerucut itu adalah...

d = 16 cm = r = 8 cm
t = 15 cm

s ² = t ² + r ²
= 15 ² + 8 ²
= 225 + 64
= 289
s = √ 289
= 17
luas selimut kerucut = 3, 14 . r . s
= 3, 14 . 8 . 17
= 427, 04
maaf kalo salah...