Answer:
Third option
Step-by-step explanation:
Given the following question where...
A triangle adds up to 180 degrees
50 + 120 = 170 + 10 = 180
The measurement of the third angle is 10 degrees or the third option.
Hope this helps.
The answer to ya question is 12.88
Multiplying 2 negatives will equal a postive.
To find x you have to put ~ 25+x+15=3x-10 ~ once you have solved for x, you plug it in ~x+15 and once you have that angle do the same to fro letter C and than find the measure for D the same way
i hope this was help