Answer:
B
Explanation:
Since there are 2 congruent angles then the triangle is right isosceles.
The 2 legs of the triangle are therefore congruent ( both x )
Use Pythagoras' identity in the right triangle.
The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is
x² + x² = (3
)² , then
2x² = 18 ( divide both sides by 2 )
x² = 9 ( take the square root of both sides )
x =
= 3 → B