Geometrymedium · Past Paper
Find the value of k if the distance between (3, k) and (4, 1) is sqrt(10).
A4 or -2
B3 or -1
C2 or -4
D5 or 1
✓ Correct Answer: A — 4 or -2
(4-3)^2 + (1-k)^2 = 10 => 1 + (1-k)^2 = 10 => (1-k)^2 = 9 => 1-k = +/-3. k=4 or k=-2.
Share this question
More from Geometry
- Which of these is NOT a criterion for congruence of triangles?
- What is the distance between the parallel lines y = 2x + 5 and y = 2x - 5?
- In an isosceles triangle, if the vertex angle is 80 degrees, find each base angle.
- If two lines are parallel to the same line, they are:
- The point where a tangent touches the circle is called: