Idon't understand trig at all can someone just explain how to do anyone of these

SOH CAH TOA 
s = opposite/ hypotenuse c= adjacent/hypotenuse t= opposite/adjacent

the side opposite from the angle is the " opposite "
the longest side is the "hypotenuse" 
the side thats left over is the adjacent

for example for question one: 
the given angle is 38 with a given opposite length of 12.5 so if you are trying to figure out the hypotenuse you'd plug into the calculator sin(38)12.5  this would give you the length of the hypotenuse. if you are trying to find the adjacent angle you would use tan(38)12.5 i hope this helps. i loved learning trigonometry in geometry!

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's