Answer:
a=-24
Step-by-step explanation:
a/-6+8=12
a/-6=4
a=-24
An equation of circle has form

So, the center is (13;1)
Now we need to find a radius
Let's create an equation

So radius is 2
Step-by-step explanation:
It appears that given geometrical shape is a HEXA-DECAGON or a 16 sided polygon.
Measure of one interior angle of hexa-decagon can be given as:

Answer:
x = 7
Step-by-step explanation:
Pytago:
