Which type of triangle has sides of length 3, 4, and 5?

Quiz Options

• Equilateral
• Isosceles
• Right-angled
• Scalene

Explanation

The sides satisfy the Pythagorean theorem (a^2 + b^2 = c^2): 3^2 + 4^2 = 9 + 16 = 25, and 5^2 = 25. This indicates it is a right-angled triangle.