Can the Right Bisectors of a Triangle Meet at a Common Point?

In summary, to prove that the right bisectors of the sides of triangle ABC meet at a common point, we can use the midpoints of the sides and the equations of the perpendicular bisectors. This involves finding the slopes of the sides of the triangle and then finding the slopes of the perpendicular lines. We can then use the midpoint formula to find the equations of the perpendicular bisectors.
  • #1
kevykevy
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Homework Statement


In triangle ABC, with vertices A(0,a), B(0,0) and C(b,c) prove that the right bisectors of the sides meet at a common point (the circumcentre).


Homework Equations


Midpoint(x1 + x2 / 2 , y1 + y2 / 2)
Length of a Line

The Attempt at a Solution


I was thinking of using the Midpoints to prove that Midpoint AD = Midpoint BE = Midpoint CF...is this the right way?
 
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  • #2
Try finding the equations of the perpendicular bisectors.
 
  • #3
am i supposed to use new points D, E, and F? or should i use the circumcentre P?
 
  • #4
You can find the slopes of the lines that make up the 3 sides of the triangle, right? Once you do that, do you know how to find the slopes of lines perpendicular to each of these three lines?

You also have one point on each of the bisectors: the midpoints of the sides of the triangles. Do you know a way of finding the equation of a line knowing its slope and one point on it?
 

What is an analytic proof in geometry?

An analytic proof in geometry is a method of proving geometric theorems using algebraic equations and properties. It involves using coordinates and equations to prove relationships between geometric figures.

How is an analytic proof different from a synthetic proof?

An analytic proof differs from a synthetic proof in that it relies on algebraic equations and coordinates, while a synthetic proof uses logical reasoning and the properties of geometric shapes.

What are the benefits of using analytic proofs in geometry?

Using analytic proofs in geometry allows for a more systematic and precise approach to proving theorems. It also allows for the use of algebraic techniques, making it easier to solve complex problems.

What are some common techniques used in analytic proofs?

Some common techniques used in analytic proofs include coordinate geometry, algebraic manipulation, and the use of geometric formulas such as distance and slope.

How can one improve their skills in using analytic proofs in geometry?

One can improve their skills in using analytic proofs by practicing and familiarizing themselves with various geometric formulas and algebraic techniques. It is also helpful to study and understand the properties of geometric figures and how they relate to algebraic equations.

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