The length of the longer leg of a 30°– 60°– 90° triangle with hypotenuse length 4 is _____

Question

I do not understand how to figure this out.

Answer 1

The sides of the 30°-60°-90° are in the ratio of
1 : √3 : 2

so yours is a : b : 4

b/√3 = 4/2
b = 2√3