In advanced mathematics (pitkä matematiikka), what is the area of the triangle in with vertices , , and ?
Answer and explanation
Correct answer: B.
- Step 1: Vectors are and . The cross product is . The magnitude is . The triangle area is half of this: . Wait, let's check: , so area is . Let's make the correct answer! **Answer: . Why not the others:** is the area of the parallelogram without halving, and is an incorrect calculation.
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