Respuesta :
Answer:
161+7=168 180-168=12. answer:12
Step-by-step explanation:
all triangles add up to 180, so if you add 7 and 161 together, the last angle has to make it so that it equals 180. therefore, it would be 12.
first, you should know that there are 180 degrees in a triangle. what you will do is:
180-161-7=12
the measure of the third angle is 12
180-161-7=12
the measure of the third angle is 12