390.20 is the answer because 4%of 2880 is 115.20 plus 275.00 is 390.20
The first is yes and the second is no
My guess is 3/6 is your answer
For #1 it's going to be proper because it's pretty specific, and for number two it's going to be all common because it's not citing anything specific.
The vertex angle of any triangle of the dodecagon formed by radii and a side is 360/12=30º.
The half-length of the base of the triangle is sin15=0.2588 approx.
Since there are 12 sides there are 24 half-sides in the perimeter=6.2117.
