Which of the following statements must be true about this diagram? Check all that apply
A. m 4 is greater than m 1.
B. The degree measure of 23 equals the sum of the degree
measures of 21 and 22.
DC. The degree measure of 24 equals the sum of the degree
measures of 21 and 22.
D. The degree measure of 24 equals the sum of the degree
measures of 22 and 23.
Em23 is greater than m22
Em24 is greater than m22

a

step-by-step explanation:

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what is the question?

step-by-step explanation:

yes

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.