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Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698

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BuyFindarrow_forward

Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698
Textbook Problem
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Complete an analytic proof of the following theorem: In a triangle that has sides of lengths a ,   b , and c , if c 2 = a 2 + b 2 , then the triangle is a right triangle.

Chapter 10.4, Problem 30E, Complete an analytic proof of the following theorem: In a triangle that has sides of lengths a,b,

To determine

To prove:

A triangle has sides of lengths a, b, and c, if c2=a2+b2, then the triangle is a right triangle

Explanation

Given figure is,

The above figure shows the triangle ABC.

And the coordinates of the quadrilateral ABC is as shown in the figure,

C0, 0, B(a,0) and A(r,s)

a is the length of CB

b is the length of AC

c is the length of AB

a=a-02+(0-0)2

a=a2

c=r-a2+(s-0)2

c=r-a2+s2

b=0-r2+(0-s)2

b=r2+s2

Substituting a, b, c values in the equation c2=a2+b2

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