Advanced Mathematical Concepts: Precalculus with Applications, Student Edition
Advanced Mathematical Concepts: Precalculus with Applications, Student Edition
1st Edition
ISBN: 9780078682278
Author: McGraw-Hill, Berchie Holliday
Publisher: Glencoe/McGraw-Hill
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Chapter 7.7, Problem 32E
To determine

To find: the radius of the inscribed circle for the triangle with vertices.

Expert Solution & Answer
Check Mark

Answer to Problem 32E

  60210+35+5

Explanation of Solution

Given information:

Let the vertices be A,B and C .

  A(0,0),B(10,0) and C(4,12)

The intersection of angle bisectors is the center of the inscribed circle of the triangle.

The inscribed circle is tangent to each side of triangle.

Calculation:

Evaluate the equation for line AB as shown below.

  yyB=yByAxBxA(xxB)y0=00100(x10)                 [Put the point coordinates]y=0

So, the value of A,B and C is 0,0 and 0 .

Evaluate the equation for line AC as shown below.

  yyC=yCyAxCxA(xxC)y(12)=12040(x(4))                 [Put the point coordinates]y12=3x123xy=0

So, the value of A,B and C is 3,1 and 0 .

Evaluate the equation for line BC as shown below.

  yyB=yCyBxCxB(xxB)y0=120410(x10)                 [Put the point coordinates]y=2(x10)y=2x+202xy+20=0

So, the value of A,B and C is 2,1 and 20 .

Use the distance formula to evaluate bisector of A as follows:

  y02+12=3xy32+12y=3xy1010y=3xy3x(10+1)y=0orx=(10+1)y3                                 ... (1)

Use the distance formula to evaluate bisector of B as follows:

  y02+12=2xy+2032+12y=2xy+2055y=2xy+202x+(5+1)y20=0orx=(5+1)y+202                                 ... (2)

Compare equation (1) and (2) and find the point of intersection as follows:

  (10+1)y3=(5+1)y+2022(10+1)y=3((5+1)y+20)(210+2)y=60(35+3)y(210+2+35+3)y=60(210+35+5)y=60y=60210+35+5

The distance between the y -coordinate and AB gives the inradius i.e. the radius of the inscribed circle. Thus, the radius is 60210+35+5 .

Chapter 7 Solutions

Advanced Mathematical Concepts: Precalculus with Applications, Student Edition

Ch. 7.1 - Prob. 11CFUCh. 7.1 - Prob. 12CFUCh. 7.1 - Prob. 13CFUCh. 7.1 - Prob. 14CFUCh. 7.1 - Prob. 15CFUCh. 7.1 - Prob. 16CFUCh. 7.1 - Prob. 17CFUCh. 7.1 - Prob. 18ECh. 7.1 - Prob. 19ECh. 7.1 - Prob. 20ECh. 7.1 - Prob. 21ECh. 7.1 - Prob. 22ECh. 7.1 - Prob. 23ECh. 7.1 - Prob. 24ECh. 7.1 - Prob. 25ECh. 7.1 - Prob. 26ECh. 7.1 - Prob. 27ECh. 7.1 - Prob. 28ECh. 7.1 - Prob. 29ECh. 7.1 - Prob. 30ECh. 7.1 - Prob. 31ECh. 7.1 - Prob. 32ECh. 7.1 - Prob. 33ECh. 7.1 - Prob. 34ECh. 7.1 - Prob. 35ECh. 7.1 - Prob. 36ECh. 7.1 - Prob. 37ECh. 7.1 - Prob. 38ECh. 7.1 - Prob. 39ECh. 7.1 - Prob. 40ECh. 7.1 - Prob. 41ECh. 7.1 - Prob. 42ECh. 7.1 - Prob. 43ECh. 7.1 - Prob. 44ECh. 7.1 - Prob. 45ECh. 7.1 - Prob. 46ECh. 7.1 - Prob. 47ECh. 7.1 - Prob. 48ECh. 7.1 - Prob. 49ECh. 7.1 - Prob. 50ECh. 7.1 - Prob. 51ECh. 7.1 - Prob. 52ECh. 7.1 - Prob. 53ECh. 7.1 - Prob. 54ECh. 7.1 - Prob. 55ECh. 7.1 - Prob. 56ECh. 7.1 - Prob. 57ECh. 7.1 - Prob. 58ECh. 7.1 - Prob. 59ECh. 7.1 - Prob. 60ECh. 7.1 - Prob. 61ECh. 7.1 - Prob. 62ECh. 7.1 - Prob. 63ECh. 7.1 - Prob. 64ECh. 7.1 - Prob. 65ECh. 7.1 - Prob. 66ECh. 7.1 - Prob. 67ECh. 7.1 - Prob. 68ECh. 7.1 - Prob. 69ECh. 7.2 - Prob. 1GCECh. 7.2 - Prob. 2GCECh. 7.2 - Prob. 3GCECh. 7.2 - Prob. 4GCECh. 7.2 - Prob. 5GCECh. 7.2 - Prob. 1CFUCh. 7.2 - Prob. 2CFUCh. 7.2 - Prob. 3CFUCh. 7.2 - Prob. 4CFUCh. 7.2 - Prob. 5CFUCh. 7.2 - Prob. 6CFUCh. 7.2 - Prob. 7CFUCh. 7.2 - Prob. 8CFUCh. 7.2 - Prob. 9CFUCh. 7.2 - Prob. 10CFUCh. 7.2 - Prob. 11CFUCh. 7.2 - Prob. 12CFUCh. 7.2 - Prob. 13ECh. 7.2 - Prob. 14ECh. 7.2 - Prob. 15ECh. 7.2 - Prob. 16ECh. 7.2 - Prob. 17ECh. 7.2 - Prob. 18ECh. 7.2 - Prob. 19ECh. 7.2 - Prob. 20ECh. 7.2 - Prob. 21ECh. 7.2 - Prob. 22ECh. 7.2 - Prob. 23ECh. 7.2 - Prob. 24ECh. 7.2 - Prob. 25ECh. 7.2 - Prob. 26ECh. 7.2 - Prob. 27ECh. 7.2 - Prob. 28ECh. 7.2 - Prob. 29ECh. 7.2 - Prob. 30ECh. 7.2 - Prob. 31ECh. 7.2 - Prob. 32ECh. 7.2 - Prob. 33ECh. 7.2 - Prob. 34ECh. 7.2 - Prob. 35ECh. 7.2 - Prob. 36ECh. 7.2 - Prob. 37ECh. 7.2 - Prob. 38ECh. 7.2 - Prob. 39ECh. 7.2 - Prob. 40ECh. 7.2 - Prob. 41ECh. 7.2 - Prob. 42ECh. 7.2 - Prob. 43ECh. 7.2 - Prob. 44ECh. 7.2 - Prob. 45ECh. 7.2 - Prob. 46ECh. 7.2 - Prob. 47ECh. 7.2 - Prob. 48ECh. 7.2 - Prob. 49ECh. 7.2 - Prob. 50ECh. 7.2 - Prob. 51ECh. 7.2 - Prob. 52ECh. 7.2 - Prob. 53ECh. 7.3 - Prob. 1CFUCh. 7.3 - Prob. 2CFUCh. 7.3 - Prob. 3CFUCh. 7.3 - Prob. 4CFUCh. 7.3 - Prob. 5CFUCh. 7.3 - Prob. 6CFUCh. 7.3 - Prob. 7CFUCh. 7.3 - Prob. 8CFUCh. 7.3 - Prob. 9CFUCh. 7.3 - Prob. 10CFUCh. 7.3 - Prob. 11CFUCh. 7.3 - Prob. 12CFUCh. 7.3 - Prob. 13CFUCh. 7.3 - Prob. 14ECh. 7.3 - Prob. 15ECh. 7.3 - Prob. 16ECh. 7.3 - Prob. 17ECh. 7.3 - Prob. 18ECh. 7.3 - Prob. 19ECh. 7.3 - Prob. 20ECh. 7.3 - Prob. 21ECh. 7.3 - Prob. 22ECh. 7.3 - Prob. 23ECh. 7.3 - Prob. 24ECh. 7.3 - Prob. 25ECh. 7.3 - Prob. 26ECh. 7.3 - Prob. 27ECh. 7.3 - Prob. 28ECh. 7.3 - Prob. 29ECh. 7.3 - Prob. 30ECh. 7.3 - Prob. 31ECh. 7.3 - Prob. 32ECh. 7.3 - Prob. 33ECh. 7.3 - Prob. 34ECh. 7.3 - Prob. 35ECh. 7.3 - Prob. 36ECh. 7.3 - Prob. 37ECh. 7.3 - Prob. 38ECh. 7.3 - Prob. 39ECh. 7.3 - 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Prob. 8CFUCh. 7.5 - Prob. 9CFUCh. 7.5 - Prob. 10CFUCh. 7.5 - Prob. 11CFUCh. 7.5 - Prob. 12ECh. 7.5 - Prob. 13ECh. 7.5 - Prob. 14ECh. 7.5 - Prob. 15ECh. 7.5 - Prob. 16ECh. 7.5 - Prob. 17ECh. 7.5 - Prob. 18ECh. 7.5 - Prob. 19ECh. 7.5 - Prob. 20ECh. 7.5 - Prob. 21ECh. 7.5 - Prob. 22ECh. 7.5 - Prob. 23ECh. 7.5 - Prob. 24ECh. 7.5 - Prob. 25ECh. 7.5 - Prob. 26ECh. 7.5 - Prob. 27ECh. 7.5 - Prob. 28ECh. 7.5 - Prob. 29ECh. 7.5 - Prob. 30ECh. 7.5 - Prob. 31ECh. 7.5 - Prob. 32ECh. 7.5 - Prob. 33ECh. 7.5 - Prob. 34ECh. 7.5 - Prob. 35ECh. 7.5 - Prob. 36ECh. 7.5 - Prob. 37ECh. 7.5 - Prob. 38ECh. 7.5 - Prob. 39ECh. 7.5 - Prob. 40ECh. 7.5 - Prob. 41ECh. 7.5 - Prob. 42ECh. 7.5 - Prob. 43ECh. 7.5 - Prob. 44ECh. 7.5 - Prob. 45ECh. 7.5 - Prob. 46ECh. 7.5 - Prob. 47ECh. 7.5 - Prob. 48ECh. 7.5 - Prob. 49ECh. 7.5 - Prob. 50ECh. 7.5 - Prob. 51ECh. 7.5 - Prob. 52ECh. 7.5 - Prob. 53ECh. 7.5 - Prob. 54ECh. 7.5 - Prob. 55ECh. 7.5 - Prob. 56ECh. 7.5 - Prob. 57ECh. 7.5 - Prob. 58ECh. 7.5 - Prob. 59ECh. 7.5 - Prob. 60ECh. 7.5 - Prob. 61ECh. 7.5 - Prob. 62ECh. 7.5 - Prob. 63ECh. 7.5 - Prob. 64ECh. 7.5 - Prob. 65ECh. 7.5 - Prob. 66ECh. 7.5 - Prob. 67ECh. 7.5 - Prob. 68ECh. 7.5 - Prob. 69ECh. 7.5 - Prob. 70ECh. 7.5 - Prob. 71ECh. 7.5 - Prob. 72ECh. 7.6 - Prob. 1CFUCh. 7.6 - Prob. 2CFUCh. 7.6 - Prob. 3CFUCh. 7.6 - Prob. 4CFUCh. 7.6 - Prob. 5CFUCh. 7.6 - Prob. 6CFUCh. 7.6 - Prob. 7CFUCh. 7.6 - Prob. 8CFUCh. 7.6 - Prob. 9CFUCh. 7.6 - Prob. 10CFUCh. 7.6 - Prob. 11CFUCh. 7.6 - Prob. 12CFUCh. 7.6 - Prob. 13CFUCh. 7.6 - Prob. 14CFUCh. 7.6 - Prob. 15CFUCh. 7.6 - Prob. 16ECh. 7.6 - Prob. 17ECh. 7.6 - Prob. 18ECh. 7.6 - Prob. 19ECh. 7.6 - Prob. 20ECh. 7.6 - Prob. 21ECh. 7.6 - Prob. 22ECh. 7.6 - Prob. 23ECh. 7.6 - Prob. 24ECh. 7.6 - Prob. 25ECh. 7.6 - Prob. 26ECh. 7.6 - Prob. 27ECh. 7.6 - Prob. 28ECh. 7.6 - Prob. 29ECh. 7.6 - Prob. 30ECh. 7.6 - Prob. 31ECh. 7.6 - Prob. 32ECh. 7.6 - Prob. 33ECh. 7.6 - Prob. 34ECh. 7.6 - Prob. 35ECh. 7.6 - Prob. 36ECh. 7.6 - Prob. 37ECh. 7.6 - Prob. 38ECh. 7.6 - Prob. 39ECh. 7.6 - Prob. 40ECh. 7.6 - Prob. 41ECh. 7.6 - Prob. 42ECh. 7.6 - Prob. 43ECh. 7.6 - Prob. 44ECh. 7.6 - Prob. 45ECh. 7.6 - Prob. 46ECh. 7.7 - Prob. 1CFUCh. 7.7 - Prob. 2CFUCh. 7.7 - Prob. 3CFUCh. 7.7 - Prob. 4CFUCh. 7.7 - Prob. 5CFUCh. 7.7 - Prob. 6CFUCh. 7.7 - Prob. 7CFUCh. 7.7 - Prob. 8CFUCh. 7.7 - Prob. 9CFUCh. 7.7 - Prob. 10CFUCh. 7.7 - Prob. 11ECh. 7.7 - Prob. 12ECh. 7.7 - Prob. 13ECh. 7.7 - Prob. 14ECh. 7.7 - Prob. 15ECh. 7.7 - Prob. 16ECh. 7.7 - Prob. 17ECh. 7.7 - Prob. 18ECh. 7.7 - Prob. 19ECh. 7.7 - Prob. 20ECh. 7.7 - Prob. 21ECh. 7.7 - Prob. 22ECh. 7.7 - Prob. 23ECh. 7.7 - Prob. 24ECh. 7.7 - Prob. 25ECh. 7.7 - Prob. 26ECh. 7.7 - Prob. 27ECh. 7.7 - Prob. 28ECh. 7.7 - Prob. 29ECh. 7.7 - Prob. 30ECh. 7.7 - Prob. 31ECh. 7.7 - Prob. 32ECh. 7.7 - Prob. 33ECh. 7.7 - Prob. 34ECh. 7.7 - Prob. 35ECh. 7.7 - Prob. 36ECh. 7.7 - Prob. 37ECh. 7.7 - Prob. 38ECh. 7.7 - Prob. 39ECh. 7.7 - Prob. 40ECh. 7 - Prob. 1SGACh. 7 - Prob. 2SGACh. 7 - Prob. 3SGACh. 7 - Prob. 4SGACh. 7 - Prob. 5SGACh. 7 - Prob. 6SGACh. 7 - Prob. 7SGACh. 7 - Prob. 8SGACh. 7 - Prob. 9SGACh. 7 - Prob. 10SGACh. 7 - Prob. 11SGACh. 7 - Prob. 12SGACh. 7 - Prob. 13SGACh. 7 - Prob. 14SGACh. 7 - Prob. 15SGACh. 7 - Prob. 16SGACh. 7 - Prob. 17SGACh. 7 - Prob. 18SGACh. 7 - Prob. 19SGACh. 7 - Prob. 20SGACh. 7 - Prob. 21SGACh. 7 - Prob. 22SGACh. 7 - Prob. 23SGACh. 7 - Prob. 24SGACh. 7 - Prob. 25SGACh. 7 - Prob. 26SGACh. 7 - Prob. 27SGACh. 7 - Prob. 28SGACh. 7 - Prob. 29SGACh. 7 - Prob. 30SGACh. 7 - Prob. 31SGACh. 7 - Prob. 32SGACh. 7 - Prob. 33SGACh. 7 - Prob. 34SGACh. 7 - Prob. 35SGACh. 7 - Prob. 36SGACh. 7 - Prob. 37SGACh. 7 - Prob. 38SGACh. 7 - Prob. 39SGACh. 7 - Prob. 40SGACh. 7 - Prob. 41SGACh. 7 - Prob. 42SGACh. 7 - Prob. 43SGACh. 7 - Prob. 44SGACh. 7 - Prob. 45SGACh. 7 - Prob. 46SGACh. 7 - Prob. 47SGACh. 7 - Prob. 1SAPCh. 7 - Prob. 2SAPCh. 7 - Prob. 3SAPCh. 7 - Prob. 4SAPCh. 7 - Prob. 5SAPCh. 7 - Prob. 6SAPCh. 7 - Prob. 7SAPCh. 7 - Prob. 8SAPCh. 7 - Prob. 9SAPCh. 7 - Prob. 10SAP
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