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:

I think it might be a sphere sorry if I got it wrong
Never seen the exact thing before
But if I’m not mistaken
a should be the number before x^2
b is before x
c is the last number
including the negative sign!
Answer:
4
Step-by-step explanation:
The general equation of a circle with center (a, b) and radius r is given by the equation;

The constant in the right hand side of the equation is simply the square of the radius;
We have been given the following equation;
(x-3)^2 + (y+1)^2 = 16
Comparing this with the general equation above;
