# What is the equation of the perpendicular bisector of a chord of a circle?

For a chord AB, with

The necessary line equation is

By signing up, you agree to our Terms of Service and Privacy Policy

The equation of the perpendicular bisector of a chord of a circle is the equation of a diameter of the circle.

Let's assume that the circle's standard equation has radius r and a center at origin.

The chord AB's coordinates for its end points

The middle point C (x',y') coordinate for AB

The AB slope

The perpendicular bisector of AB has a slope of

The formula for AB's perpendicular bisector

OR

Since this is, of course, the equation of a straight line through the circle's origin (0,0), or center, the perpendicular bisector of the chord equals the circle's diameter.

By signing up, you agree to our Terms of Service and Privacy Policy

The equation of the perpendicular bisector of a chord of a circle can be found using the midpoint formula and the negative reciprocal of the slope of the chord. Given the endpoints of the chord (x1, y1) and (x2, y2), the midpoint (h, k) of the chord is found using: h = (x1 + x2) / 2 k = (y1 + y2) / 2

Then, the slope (m) of the chord is found using: m = (y2 - y1) / (x2 - x1)

The negative reciprocal of the slope is: m_perpendicular = -1 / m

Using the point-slope form of a line (y - k = m_perpendicular * (x - h)), substituting the midpoint (h, k) and the negative reciprocal slope (m_perpendicular), we get the equation of the perpendicular bisector of the chord.

By signing up, you agree to our Terms of Service and Privacy Policy

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- Adina is constructing a line perpendicular to YJ←→. She has already constructed two arcs as shown. She moves her compass point to Y to construct an arc above the line. What must be true about the width of Adina’s compass opening before she draws the arc?
- What is the orthocenter of a triangle with corners at #(4 ,7 )#, #(9 ,5 )#, and #(5 ,6 )#?
- A triangle has corners A, B, and C located at #(8 ,3 )#, #(4 ,5 )#, and #(2 , 7 )#, respectively. What are the endpoints and length of the altitude going through corner C?
- A triangle has corners A, B, and C located at #(7 ,3 )#, #(4 ,8 )#, and #(3 , 4 )#, respectively. What are the endpoints and length of the altitude going through corner C?
- A triangle has corners A, B, and C located at #(5 ,2 )#, #(2 ,5 )#, and #(3 ,7 )#, respectively. What are the endpoints and length of the altitude going through corner C?

- 98% accuracy study help
- Covers math, physics, chemistry, biology, and more
- Step-by-step, in-depth guides
- Readily available 24/7