Single Answer MCQ
Q-00052101
What is the formula to calculate the distance of a point P(x1, y1) from a line Ax + By + C = 0?
1
d = |Ax1 + By1 + C| / √(A² + B²)
2
d = √(A² + B²)
3
d = |Ax1 + By1| / C
4
d = (Ax1 + By1)²
Answer and Solution
Answer
A. d = |Ax1 + By1 + C| / √(A² + B²)
Solution:
The correct formula is d = |Ax1 + By1 + C| / √(A² + B²). This represents the perpendicular distance from point P to the line. The other options do not express this relationship accurately.
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