Each of the angles in a triangle are 60 degrees, so when you add them together, you get 180
60+60+60=180
Expanded Notation:
A. 654.362 = (6x100) + (5x10) + (4x1) + (3x0.1) + (6x0.01) + (2x0.001)
B. 125.384 = (1x100) + (2x10) + (5x1) + (3x0.1) + (4x0.01) + (8x0.001)
I believe there is 100 girls or something close to that.
