A circle has a radius of
13 units and is centered at (-9.3, 4.1).
Write the equation of this circle.

(x+9.3)²+(y-4.1)²=169

Step-by-step explanation:

The common equation for a circle in the coordinate plane is:

(x-h)²+(y-k)²=r²

Where (h,k) is the point at the center of the circle and r is the radius:

Here (h,k) is (-9.3, 4.1) and r is 13.

Using this we can substitute to find:

(x-(-9.3))²+(y-(4.1))²=13²

And using arithmetic to simplify we find that the equation of the circle is:

(x+9.3)²+(y-4.1)²=169

529 and 531

step-by-step explanation:

trapezoid

step-by-step explanation:

first i plotted all my points on a grid graph

i made sure all of them were in the correct quadrant

then i saw it was a trapezoid or a quadrilateral