Which of the following statements must be true about this diagram? Check all that apply.
A. m<3 is greater than m<2
B. m<4 is greater than m<1
C. m<4 is greater than m<2
D. The degree measure of <3 equals the sum of the degree measures of <1 and <2.
E. The degree measure of <4 equals the sum of the degree measures of <1 and <2.
F. the degree measure of <4 equals the sum of the degree measures of <2 and <3.