Penjelasan dengan langkah-langkah:
9. x = r × cos ɑ
x = 6 × cos 300°
x = 6 × 1/2
x = 3
y = r × sin ɑ
y = 6 × sin 300°
y = 6 × -1/2 √3
y = -3√3
Koordinat kartesius (3, -3√3)
10. s = (a + b + c)/2 = (8 + 6 + 10)/2 = 24/2 = 12 cm
L = √(s (s - a) (s - b) (s - c))
L = √(12 (12 - 8) (12 - 6) (12 - 10))
L = √(12 (4) (6) (2))
L = √576
L = 24 cm²
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Penjelasan dengan langkah-langkah:
9. x = r × cos ɑ
x = 6 × cos 300°
x = 6 × 1/2
x = 3
y = r × sin ɑ
y = 6 × sin 300°
y = 6 × -1/2 √3
y = -3√3
Koordinat kartesius (3, -3√3)
10. s = (a + b + c)/2 = (8 + 6 + 10)/2 = 24/2 = 12 cm
L = √(s (s - a) (s - b) (s - c))
L = √(12 (12 - 8) (12 - 6) (12 - 10))
L = √(12 (4) (6) (2))
L = √576
L = 24 cm²