Multiple choice general knowledge math & puzzles

Which of the following is true?

  1. Every isoceles triangle is equilateral

  2. Every equilateral triangle is isoceles

  3. A triangle can have two right angles

  4. A scalene triangle has at least two sides the same length
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Every equilateral triangle (all sides equal) is also isosceles (at least two sides equal). An isosceles triangle only requires two equal sides, so an equilateral triangle with three equal sides satisfies this condition. The reverse is not true - an isosceles triangle is not necessarily equilateral.

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