Answer:
(D)9 divided by sin 60 degrees
Step-by-step explanation:
From the given figure, using trigonometry

Substituting the given values, we get





Thus, The length of the support AB is 9 divided by sin 60 degrees.
Its 234!!!!!!!!!!!!!! Just checked my work
To find the halfway points between two numbers, add the numbers and divide the quantity by 2. -5+15 equals 10 and 10/2=5 therefore 5 is halfway between -5 and 15.