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panjang apotemanya
Apotema = a
a^2 = 10^2 - 8^2
......=
a^2 = 100 - 64
a = √36
a = 6
=2 x 10
=20
B. a^2 = 10^2 - 8^2
a^2 = 100 - 64
a = √36
a = 6