# geometry

posted by .

the endpoints of the diameter of circle O are (-2,-1) and (-16,13). what are the coordinates of its center?

• geometry -

The centre will be the midpoint of your two given points
for x of midpoint: (-2+(-16))/2 = -9
for y of midpoint : (-1 + 13)/2 = 6

the centre is (-9,6)

## Similar Questions

1. ### math

Line AB is the diameter of circle C. If the endpoints of the diameter are A(3, -4) and B(-2, 5), what are the coordinates of the center of the circle C?
2. ### Geometry

In circle O, diameter RS has endpoints R(3a,2b-1) and S(a-6,4b+5). Find the coordinates of point O in terms of a and b. Express your answer in simplest form.
3. ### geometry

This one is confusing me. please help The diameter of a circle has endpoints P(–10, –2) and Q(4, 6).Find the center of the circle.Find the radius. If your answer is not an integer, express it in radical form. Write an equation …
4. ### GEOMETRY

The diameter of a circle has endpoints P(–10, –2) and Q(4, 6). a.Find the center of the circle. b.Find the radius. If your answer is not an integer, express it in radical form. c.Write an equation for the circle.
5. ### geometry

Name the diameter, radius, center, and the equation of the circle with a diameter that has endpoints at (-3, 4) and (5, -2).
6. ### Geometry

line segment ab is the diameter of circle O whose center has coordinates (6,8) . what are the coordinates of point b if the coordinates of point a are (4,2)
7. ### geometry

a circle has diameter endpoints of A(5,10) and B(-3,4). what are the coordinates of the center of the circle
8. ### Geometry midpoint formula

A circle on the Coordinate plane has a diameter with endpoints at (6,8) and (15,8). What are the coordinates of the center of the circle?
9. ### geometry

2. For the circle with equation (x – 2)2 + (y + 3)2 = 9, answer each question: a) What are the coordinates of the center?
10. ### geometry

PQ has endpoints at P (-2,3) and Q (4,1). The center of dilation is (-1,4) and the scale factor is 2. What are the coordinates of the endpoints of P'Q'?

More Similar Questions