The statement below is followed by four options. Each option is related to the item in the statement, but only one is always true. Select the option that always holds and makes the statement true.
"A triangle always has ______."
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Three sides
The answer must hold for every triangle, without exception. An option that is present in most cases but can be missing in even one case is not always true.
Option (1) A right angle — only a right-angled triangle has one; an equilateral triangle has three angles of 60° and no right angle.
Option (2) Two equal sides — a scalene triangle has all three sides of different lengths.
Option (3) Three sides — a triangle is a closed figure made of three line segments; a figure with any other number of sides is not a triangle, so this is always true.
Option (4) An angle greater than 90° — only an obtuse-angled triangle has one; an equilateral or a right-angled triangle has no angle above 90°.