jika tinggi kerucut 15cm dan jari jari alasnya 8cm maka luas kerucut tersebut adl

t = 15 cm
r = 8 cm
Lp = ?

s =√15²+8²
=√225+64
=√289
= 17 cm

Lp = πrs+πr²
= πr(r+s)
= 3,14. 8 (8+17)
= 25,12 (25)
= 628 cm²