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rusuk alas (a) = 6√2
sisi miring (c) = 18
Dit : t (b)?
b^2 = c^2 - a^2
b^2 = 18^2 - 6√2^2
b^2 = 324 - 36 × 2
b^2= 324 - 72
b^2 = 252
b = √252
b = √4. 63
b = √4. 9. 7
b = 2.3 √7
b = 6√7
jadi tingginya 6√7 cm