I hope you guys can help me! If I don't get a 75% on this exam I fail, and will not graduate.

I'm having trouble clicking with Trig. I have the info recorded such as;

Use Soh-Cah-Toa for right angled triangles

Use Sine Law for ASS or ASA

Use Cosine Law for SSS or SAS

But when I look at a question I just freeze and don't know what to do.

This one for example;

A stencil is made out of plastic. What is the are of the plastic? The inner design is an equilateral triangle, inside a larger equilateral triangle, inside a square.

I made a not-so-good drawing to try and help;

If someone couldpleaseexplain how to solve this I will be extremely happy ... until my next question.