Answer:
hello something is wrong with the question. if ab= AC, and AC = BC, AB=BC, it'd make this an equilateral triangle and the degree wouldn't be 20 degrees
2600 divided by 45 equals 57.7 repeating or rounding up 58
The 8 inch one
8/4=2
10/6= approx 1.66666666666666
12 x 10 = 120
12 + 12 + 10 + 10 = 44
12 by 10
Hope this helps!