passwella.
Menu

WAEC Further Mathematics 2010 Question 11

Question 11

Coordinate Geometry

Calculate, correct to one decimal place, the length of the line joining points x(3, 5) and y(5, 1).

  1. A.4.0
  2. B.4.2
  3. C.4.5
  4. D.5.0
Show the answer and explanation

Answer: C (4.5)

Explanation

Length = √((5 − 3)2 + (1 − 5)2) = √(4 + 16) = √20 ≈ 4.47 = 4.5 to 1 d.p.