In the right triangle shown, \angle a = 30^\circ∠a=30 ∘ and ab = 4ab=4. how long is bcbc?

BC=2

Step-by-step explanation:

Consider right triangle ABC with right angle C and angle A of the measure of 30°. In this triangle, AB=4.

Theorem: The leg opposite to the 30° angle is half of the hypotenuse.

Note that AB=4 is the hypotenuse, angle A has the meausre of 30°, then the leg BC is half of AB:

step-by-step explanation:

(3rd option) - c