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Verified answer
4) PR = √10² - 8²= √100 - 64
= √36
= 6 cm
Luas = 1/2 x a x t
= 1/2 x 8 cm x 6 cm
= 24 cm²
5) BC / 6 cm = 12 cm / 4 cm
BC = 6 cm x 12 cm / 4
BC = 18 cm