Answer:
30
Step-by-step explanation:
1.Substitute the x for 12.
2.Multiply the 2 by 12.
3.Then add 6 to your answer.
Answer: Transitive property of congruence
So you question is most likely about a triangle DEF with the 3 angles being named D, E, F. The triangle would look something like the image attached below.
If that is what is being asked then i need more info to answer but
By Definition it would be 180 degrees.
Sometimes system outputs are limited because the amount of the necessary information that is perceived in the system .
Step-by-step explanation:
Union = elements of A + elements of B
Union = ( 1,6,7,9,12)