Geometrymedium · Past Paper
Find the value of p if the lines 3x + 4y = 5 and px - 3y = 2 are perpendicular.
A3
B4
C5
D1
✓ Correct Answer: B — 4
Slopes: m1 = -3/4, m2 = p/3. m1*m2 = -1 => (-3/4)*(p/3) = -1 => -p/4 = -1 => p = 4.
Share this question
More from Geometry
- Find the area of a triangle with vertices (1, 2), (3, 4), and (10, 6).
- In a right-angled triangle, if one acute angle is 40 degrees, find the other acute angle.
- Find the coordinates of the circumcenter of a triangle with vertices (0,0), (8,0), and (0,6).
- If the circumference of a circle is 132 cm, find its radius. (Take pi = 22/7)
- The radius of the circle inscribed in a triangle with sides 3, 4, 5 is: