Answer:
2
Explanation:
Using Pythagoras' identity in the right triangle.
let the third side ( hypotenuse ) be x , then
x² = 1² + ( )² = 1 + 3 = 4 ( take square root of both sides )
x = = 2
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)² = 1 + 3 = 4 ( take square root of both sides )
= 2