tolong dibantu kak hari ini dikirim
Jawaban:
∆ABC = ∆ADC + ∆DBC
CD = √CB² - DB² = √10² - 6² = √100 - 36 = √64
= 8cm
AD = √AC2 - CD² = √17² - 8² = √289 - 64 = √225
= 15cm
luas ∆ADC = 1/2 x AD x CD = 1/2 x 15cm x 8cm
= 60cm²
luas DBC = 1/2 x CD x DB = 1/2 x 8cm x 6cm
= 24cm²
luas ∆ABC = 60cm² + 24cm² = 84cm²
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