Question

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no 3 dan 4 dijawab karena sekarang dikumpul

Answer 1

3.a. L. sel. Kerucut =Πrs
=3,14×5×13
=204,1 cm
b. L. alas=Πr²
=3,14×5×5
=78,5 cm
c. L. per. kerucut=Πr(r+s)
=3,14×5×(5+13)
=3,14×5×18
=282,6 cm

PERHATIKAN: s didapat dari √t²+r²=√12²+5²=√144+25=√169=13

4.a. d=2×√L:Π:4
=2×√200,96:3,14:4
=2×4
=8cm

b. d=2×√L:Π:4
=2×√452,16:3,14:4
=12 cm

c. d=2×√L:Π:4
=2×√1256:3,14:4
=20 cm

d. d=2×√L:Π:4
=2×√5024:3,14:4
=40 cm