What is DEF ?
Is it a straight line ?
Is it a line that's bent in two places ?
Is it a triangle ?
Is there a picture ?
Do you have a drawing ?
Could you describe it for us ?
IF DEF is a triangle, then all three angles add up to 180 degrees.
The angles take 2 shares, 4 shares, and 4 shares of the 180.
There are (2 + 4 + 4) = 10 shares all together.
So each share is (180 / 10) = 18 degrees.
The angles are:
-- 2 shares = (2 x 18) = 36 degrees
-- 4 shares = (4 x 18) = 72 degrees
-- 4 shares = (4 x 18) = 72 degrees .
None of this means anything unless DEF is a triangle.