Hey guys please help find the area

The answer is 18

Step by step Explanation:

Due to the fact that they provided to you that the triangle is 45-45-90 triangle you know that the legs other than the hypotenuse are x and that the hypotenuse is labeled as x root 2.

3 times root 2 equals 3 root 2

Square formula: l*w

3 root 2 times 3 root 2 equals 18 because when there is a perfect square in the radical we take it out and multiply it to the coefficient. For example if 121 is inside the radical we take out 11 because 11 * 11 = 121. In this case 2 * 2 = 4 so we take the 2 and multiply it to 9 and we get 18.