Answer:

Step-by-step explanation:
<u>Equation of a Circle</u>
A circle of radius r and centered on the point (h,k) can be expressed by the equation

We are given the equation of a circle as

Note we have corrected it by adding the square to the y. Simplify by 3

Complete squares and rearrange:



We can see that, if r=4, then

Or, equivalently

There are two solutions for
:

Keeping the positive solution, as required:

The question is incomplete
Answer:
yes it is because the second triangle is the base and the other three triangles are the sides of the three dimensional shape
<span>Triangle is 180 degrees, so you will subtract 50 from 180 which will give you 130.</span>