Analyze the diagram below and complete the instructions that follow. find the value of a. A.3 B.5 C.8 D.12

Answer:
option A. 3
Step-by-step explanation:
AS shown for the fight angle triangle
12² = 18 * (a+5)
a + 5 = 12² /18 = 144/18 = 8
a = 8 - 5 = 3
So, the answer is option A. 3