I assume you mean to ask how to find the sum of the seven terms?
You have
...
So the sum is
You know that
and
, so the sum is equal to
Answer:
135
Step-by-step explanation:
The equation is 135+90+x=360. x=360-(225)=135
Hey there!
The answer to the question is A vertex is a point of intersection of two sides of an angle.
Have a great day and hope it helps!