2009 · Q42
If the figure given above ∠ABD = ∠PQD = ∠CDQ = π/2. If AB = x,PQ = z and CD = y, then which one of the following is correct?
Elementary MathematicsAlgebra
- A1/x + 1/y = 1/z
- B1/x + 1/z = 1/y
- C1/z + 1/y = 1/x
- D1/x + 1/y = 2/z
Explanation
For three vertical segments with right angles, 1/x + 1/y = 1/z.