Home › CBSE Class 11 (Commerce) › Mathematics › Straight Lines › The product of the slopes of two perpendicular n…
The product of the slopes of two perpendicular non-vertical lines is
A–1
B2
C1
D0
Answer & Solution
Correct answer: A. –1
Perpendicular lines have slopes that are negative reciprocals, so m1 m2 = –1.
Related questions
The lines 3x + 2y − 5 = 0 and kx + 4y + 1 = 0 are parallel. Find k.The points (1, 2), (3, 6) and (k, 10) are collinear. Find k.A line is perpendicular to 2x − 3y + 4 = 0. What is its slope?Find the distance between the parallel lines y = 2x + 3 and y = 2x − 2.What is the perpendicular distance of the point (2, 1) from the line 3x − 4y + 5 = 0?In the general linear equation Ax + By + C = 0, what must hold for A and B?The line 3x + 4y = 12 and the two coordinate axes enclose a triangle of areaWhich line cuts off intercepts 4 on the x-axis and 5 on the y-axis?