actually because we know its a 45 45 90 triangle, its an isosceles triangle so we can use base angle's theorem to figure out that AD=CD=6√2
then we can use the Pythagorean theorem to find that 6√2^2+6√2^2=12
Since CD and AC are both 6 x Square root of 2, AC would 12 because 6 Times Square root of 2 all to the power of 2 is 36 x2, which is 72, and 72 for both sides adds up to 144. Then you can find the square root of 144, so AC=12
ac=12
answer is 12
Im a monkey and i know it is 12 cmon yall the answer is 12
100% sure the answer isn't 6. Though I am struggling with this also, how do you find the sides when you only know the altitude?