Calculate the perimeter and area of a triangle by the coordinates of its vertices A (-2; 1); B (2; -2); C (8; 6)
| September 21, 2021 | education
Total: 10 * 8 = 80.
Reflect: (5 * 10) / 2 + (3 * 4) / 2 + (6 * 8) / 2 = 25 + 6 + 24 = 55.
Remaining: 80 – 55 = 25.
Answer: 25.
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