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luas PQR = 1/2 . PQ . RS
= 1/2 . 11 . V24
= 11/2 V24
= 5 1/2 V24
29) p/8 = 6/(6+4)
p/8 = 6/10
p = 8 x 6/10
p = 48/10 = 4,8