SOH,CAH, TOA so it would be TANGENT since it would be Opposite over Adjacent. Tan(15) = 9/a put Tan(15) onto your calculator it would be .267949 round that to .27 = 9/a cross multiply
a = 33.588. C is the correct answer.
A True
Congruent means to have the same shape and size or when we can cut them out and then match them up completely.
Answer: The term is called Two dimensional.
4m+2
because 2mx2=4m and 1x2=2 so 4m+2