semoga bs dipahami ya...
Jawab:
segitiga
aturan cosinus
luas segitiga
Penjelasan dengan langkah-langkah:
cos A = (AB² + AC² - BC²)/(2. AB. AC)
cos A = (15² + 14² - 13²)/ (2. 15.14 ) = 252/420 = 3/5
cos A = 3/5 --> sin A = 4/5
Luas ABC = 1/2. AB. AC. sin A
Luas ABC = 1/2 . 15. 14. 4/5
Luas ABC = 84 satuan
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Verified answer
semoga bs dipahami ya...
Jawab:
segitiga
aturan cosinus
luas segitiga
Penjelasan dengan langkah-langkah:
cos A = (AB² + AC² - BC²)/(2. AB. AC)
cos A = (15² + 14² - 13²)/ (2. 15.14 ) = 252/420 = 3/5
cos A = 3/5 --> sin A = 4/5
Luas ABC = 1/2. AB. AC. sin A
Luas ABC = 1/2 . 15. 14. 4/5
Luas ABC = 84 satuan