Class 12 Determinants · Mcq Single Correct1 Markstriangle_area
Class 12 Maths · Determinants · Mcq Single Correct #2
The area of the triangle with vertices (−3,0),(3,0),(0,k) is 9 square units. Find k.
✅ Step-by-Step Solution
Final Answer: Option (B): ±3
- The horizontal base has length 6 and the height is |k|, so 9=½·6·|k|. Therefore k=±3.
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CBSE Class 12 Mathematics 2026 Main Paper 65/1/1 · Q4
If Δ₁ = | 1 0 0; 0 2 0; 0 0 3 | and Δ₂ = | 0 2 0; 1 0 0; 0 0 6 |, then