Geometryeasy · Past Paper
Find the distance between P(a, b) and Q(-a, -b).
Asqrt(a^2 + b^2)
B2 * sqrt(a^2 + b^2)
C0
Da + b
✓ Correct Answer: B — 2 * sqrt(a^2 + b^2)
Distance = sqrt((-a-a)^2 + (-b-b)^2) = sqrt((-2a)^2 + (-2b)^2) = sqrt(4a^2 + 4b^2) = 2*sqrt(a^2+b^2).
Share this question
More from Geometry
- If the lines 2x + ky + 3 = 0 and 4x + 6y + 9 = 0 are parallel, then k is:
- If two triangles are congruent, their corresponding areas must be:
- The point of intersection of the altitudes of a triangle is called:
- Two chords AB and CD of a circle intersect at E. If AE = 4 cm, EB = 6 cm, and CE = 3 cm, find the length of ED.
- An exterior angle of a triangle is 110 degrees and one of the interior opposite angles is 40. Find the other interior opposite angle.