Question

What is the length of AC ? Round to the nearest tenth.

Answer 1

Answer:

A

Step-by-step explanation:

ed2020

Answer 2

In this right triangle, side AC is adjacent to the reference angle we were given.  That's our unknown.  The other side is the side opposite the reference angle, so we need a trig ratio that relates the side adjacent to the side opposite which is tangent.  Setting up our ratio we have this: $tan(55)= \frac{15}{x}$ and $x= \frac{15}{tan(55)}$.  Do that on your calculator to find that side AC (x) = 10.5, first choice above.