Answer:
What is the geometric sequence?
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
If
then

Substitute them into the equation 

Given
then

Hence,

Answer:
It is because a triangle has a total angle sum of 180 degrees.
Step-by-step explanation:
90+90=180
But that was only 2 corners so the last corner has to be 0 degrees which is impossible.