CBSE Class 12 Mathematics 2026 Main Paper 65/4/1 · Q171 Markstriangle_area
CBSE Class 12 Mathematics 2026 Main Paper 65/4/1 · Question 17 (Vector Algebra)
Find the area of triangle A=(0,1,1), B=(2,0,−1), C=(1,0,3).
✅ Step-by-Step Solution
Final Answer: √53/2
- AB=(2,−1,−2) and AC=(1,−1,2). Their cross product is (−4,−6,−1). Take half its norm.
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