Geometryhard · Past Paper
If the area of a triangle with vertices (k, 0), (4, 0), and (0, 2) is 4 square units, then k is:
A0 or 8
B0
C8
D2
✓ Correct Answer: A — 0 or 8
0.5 * |k(0-2) + 4(2-0) + 0(0-0)| = 4 => |-2k + 8| = 8. So -2k+8 = 8 (k=0) or -2k+8 = -8 (k=8).
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