Question

Please help!!!!!!!!!!

Answer 1

`\large\boxed{a=4\sqrt3}`

Explanation:

We have the triangle 30° - 60° - 90°. In that triangle sides are in proportion

1 : √3 : 2 (look at the picture).

We have

`a\sqrt3=12` multiply both sides by √3 (use √a · √a = a)

`3a=12\sqrt3` divide both sides by 3

`a=4\sqrt3`

`b=2a\to b=2(4\sqrt3)=8\sqrt3`