Jawab:
Luas segitiga = 1/2 × alas × tinggi
209 cm² = 1/2 × (6x - 8) × 19
6x - 8 = 209 ÷ (1/2 × 19) = 209 × 2 ÷ 19 = 22
6x = 22+ 8
= 30
x = 30/6 = 5
Panjang alas = 6x - 8 = 22 cm
Panjang sisi yang sama =
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Jawab:
Luas segitiga = 1/2 × alas × tinggi
209 cm² = 1/2 × (6x - 8) × 19
6x - 8 = 209 ÷ (1/2 × 19) = 209 × 2 ÷ 19 = 22
6x = 22+ 8
= 30
x = 30/6 = 5
Panjang alas = 6x - 8 = 22 cm
Panjang sisi yang sama =