The answer is 38 degrees because for every triangle, the angles add up to 180 and the small square on the triangle represents it is a right triangle, which has 90 degrees. 38 + 52 + 90 = 180
You are correct. For any polygon, the sum of the exterior angles is 360 degrees. You have the correct equation which leads to the correct answer. Nice work on that.
I would assume b ^5 .. add 3 plus 2 and put it as the power or exponent whatever it’s called
Airplane wing span ÷ Model wing span
108 /3 = 36/1
The scale factor is 36 to 1.