Answer:
The length of the shorter leg 2√3 → answer (B)
Step-by-step explanation:
∵ The triangle is 30° - 60° - 90°
∴ There is the ratio between its sides
∴ hypotenuse : middle side : shortest side = 2 : √3 : 1
∵ hypotenuse = 4√3
∴ The shortest side = 1/2 (4√3) = 2√3
