I'm pretty sure both B and C equal 12 as well
Since the triangle equals 180 and the angels are all congruent
390, because 10% of 1300 is 130 so 130 times 3 = 390
Correct Answer - C. Angle F
We know that, the Angle opposite to the longest side have largest measure. So Angle opposite to side DE ( measuring 11 units ) is greatest that is Angle F.
In math, a factor is a number being multiplied; for instance, if 7x5=35, 7 and 5 are both factors.