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d= 12. r= 12/2= 6 cm
s= 10cm
π= 3,14
Dit:
a. Tinggi.
Jawab:
s²= r²+ t²
t²= s²- r²
t²= 10² - 6²
t²= 100 - 36
t²= 64
t= √64
t= 8 cm
b. Luas Selimut Kerucut
L. Sel: πrs
L. Sel: 3,14 * 6 * 10
: 18,84 * 10
: 188,4 cm²
c. Luas Alas Kerucut
Luas Alas = Luas Lingkaran
Luas Lingkaran= πr²
= 3,14 * 6 * 6
= 3,14 * 36
= 113,04 cm²
d. Luas Sisi Kerucut
Luas Sisi= πr(r+s)
= 3,14 * 6 (6 + 10)
= 18,84 * 16
= 301,44 cm²