The triangle formed by the numbers 3, 4 and 5 is:
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Right
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Equilateral
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Isosolese
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Scalene
Reveal answer
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A
Correct answer
Explanation
A triangle with sides 3, 4, and 5 satisfies the Pythagorean theorem: 5^2 = 25 = 3^2 + 4^2 = 9 + 16 = 25. This makes it a right-angled triangle. It's not equilateral (all sides equal), not isosceles (two sides equal), and not scalene (all sides different - though technically it is scalene too, but the right angle is the defining property).
AI explanation
A triangle with sides 3, 4, and 5 satisfies the Pythagorean theorem (3² + 4² = 9 + 16 = 25 = 5²), which means the angle opposite the longest side is exactly 90°. That makes it a right triangle, even though it's also scalene (all sides different) — 'right' describes the special angle property being tested here.