Question

What is the value of a?​

Answer 1

9\sqrt{2}

Explanation:

this is a 30-60-90 triangle so

the side opposite of 30 is x and the opposite side of 60 is x
`√(2)`. then the side opposite 90 is 2x.

so if 9=x then a=x\sqrt{2}

9\sqrt{2} is the side length of a

Hope that helps :)