2014 · Q70
The three sides of a triangle are 15, 25 and x units. Which one of the following is correct?
Elementary MathematicsGeometry
- A10 < x < 40
- B10 ≤ x ≤ 40
- C10 ≤ x < 40
- D10 < x ≤ 40
Explanation
Triangle inequality: 25 - 15 < x < 25 + 15, i.e. 10 < x < 40.