...whars the figure??? You did give us dimensions but not the figure..
Answer:
Its 142
Step-by-step explanation:
Theres a website called triangle calculator and you put in three things wether its SSA or ASA or whatever and it gives you all the measurements. Good luck on your quizzes and tests :)
The lowest common denominator for 15 and 12 will get in this way
15=3*5
12 = 3*4
LCM will be 3*4*5=12*5=60
Answer:

Step-by-step explanation:
Factoring
results in 
Friend i'm guessing its the second answer
Just an educated guess