Answer:
Third side = 3√3
Explanation:
Apply pythagorean theorem, which is a² + b² = c²
Where,
a = ?
b = 3
c = 6
Substitute
a² + 3² = 6²
a² = 6² - 3²
a² = 27
a = √27
a = √(9 × 3)
a = 3√3
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