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 5.4, Problem 20E

(a)

To determine

To find: The radius of the circumscribed circle.

(a)

Expert Solution
Check Mark

Answer to Problem 20E

  Radius = 13.3

Explanation of Solution

Given information: Geometry: the apothem of a regular pentagon is 10.8 centimeters.

Calculation:

Given the apothems 10.8, find the radius of the circumscribed circle. This is the same as the radius of the regular pentagon.

Advanced Mathematical Concepts: Precalculus with Applications, Student Edition, Chapter 5.4, Problem 20E , additional homework tip  1

This is the triangle we need to find the hypotenuse and we know the adjacent side. This is a cosine problem.

  cos36=10.8rr=10.8cos36r=13.3

(b)

To determine

To find: the length of a side of the pentagon.

(b)

Expert Solution
Check Mark

Answer to Problem 20E

  Side of pentagon = 15.6

Explanation of Solution

Given information: Geometry: the apothem of a regular pentagon is 10.8 centimeters.

Calculation:

Given the apothems 10.8, find the radius of the circumscribed circle. This is the same as the radius of the regular pentagon.

Advanced Mathematical Concepts: Precalculus with Applications, Student Edition, Chapter 5.4, Problem 20E , additional homework tip  2

This is the triangle we need to find the opposite side (which is ½ of the pentagon’s side that we are trying to find) and we know the adjacent side. This is a tangent problem.

  tan36=x10.8x=10.8×tan36x=7.8

Now this is only half the side, so we need to double it.

Thus, the side of the pentagon = 15.6.

(c)

To determine

To find: The perimeter of the pentagon.

(c)

Expert Solution
Check Mark

Answer to Problem 20E

  Perimeter of pentagon = 78

Explanation of Solution

Given information: Geometry: the apothem of a regular pentagon is 10.8 centimeters.

Calculation:

We found the side of the pentagon to be 15.6 in the last problem.

A pentagon has 5 sides,

So the perimeter = 5×15.6=78

Chapter 5 Solutions

Advanced Mathematical Concepts: Precalculus with Applications, Student Edition

Ch. 5.1 - Prob. 11CFUCh. 5.1 - Prob. 12CFUCh. 5.1 - Prob. 13CFUCh. 5.1 - Prob. 14CFUCh. 5.1 - Prob. 15CFUCh. 5.1 - Prob. 16CFUCh. 5.1 - Prob. 17CFUCh. 5.1 - Prob. 18ECh. 5.1 - Prob. 19ECh. 5.1 - Prob. 20ECh. 5.1 - Prob. 21ECh. 5.1 - Prob. 22ECh. 5.1 - Prob. 23ECh. 5.1 - Prob. 24ECh. 5.1 - Prob. 25ECh. 5.1 - Prob. 26ECh. 5.1 - Prob. 27ECh. 5.1 - Prob. 28ECh. 5.1 - Prob. 29ECh. 5.1 - Prob. 30ECh. 5.1 - Prob. 31ECh. 5.1 - Prob. 32ECh. 5.1 - Prob. 33ECh. 5.1 - Prob. 34ECh. 5.1 - Prob. 35ECh. 5.1 - Prob. 36ECh. 5.1 - Prob. 37ECh. 5.1 - Prob. 38ECh. 5.1 - Prob. 39ECh. 5.1 - Prob. 40ECh. 5.1 - Prob. 41ECh. 5.1 - Prob. 42ECh. 5.1 - Prob. 43ECh. 5.1 - Prob. 44ECh. 5.1 - Prob. 45ECh. 5.1 - Prob. 46ECh. 5.1 - Prob. 47ECh. 5.1 - Prob. 48ECh. 5.1 - Prob. 49ECh. 5.1 - Prob. 50ECh. 5.1 - Prob. 51ECh. 5.1 - Prob. 52ECh. 5.1 - Prob. 53ECh. 5.1 - Prob. 54ECh. 5.1 - Prob. 55ECh. 5.1 - Prob. 56ECh. 5.1 - Prob. 57ECh. 5.1 - Prob. 58ECh. 5.1 - Prob. 59ECh. 5.1 - Prob. 60ECh. 5.1 - Prob. 61ECh. 5.1 - Prob. 62ECh. 5.1 - 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Prob. 1CFUCh. 5.7 - Prob. 2CFUCh. 5.7 - Prob. 3CFUCh. 5.7 - Prob. 4CFUCh. 5.7 - Prob. 5CFUCh. 5.7 - Prob. 6CFUCh. 5.7 - Prob. 7CFUCh. 5.7 - Prob. 8CFUCh. 5.7 - Prob. 9CFUCh. 5.7 - Prob. 10CFUCh. 5.7 - Prob. 11ECh. 5.7 - Prob. 12ECh. 5.7 - Prob. 13ECh. 5.7 - Prob. 14ECh. 5.7 - Prob. 15ECh. 5.7 - Prob. 16ECh. 5.7 - Prob. 17ECh. 5.7 - Prob. 18ECh. 5.7 - Prob. 19ECh. 5.7 - Prob. 20ECh. 5.7 - Prob. 21ECh. 5.7 - Prob. 22ECh. 5.7 - Prob. 23ECh. 5.7 - Prob. 24ECh. 5.7 - Prob. 25ECh. 5.7 - Prob. 26ECh. 5.7 - Prob. 27ECh. 5.7 - Prob. 28ECh. 5.7 - Prob. 29ECh. 5.7 - Prob. 30ECh. 5.7 - Prob. 31ECh. 5.7 - Prob. 32ECh. 5.7 - Prob. 33ECh. 5.7 - Prob. 34ECh. 5.7 - Prob. 35ECh. 5.7 - Prob. 36ECh. 5.7 - Prob. 37ECh. 5.7 - Prob. 38ECh. 5.7 - Prob. 39ECh. 5.7 - Prob. 40ECh. 5.7 - Prob. 41ECh. 5.7 - Prob. 42ECh. 5.7 - Prob. 43ECh. 5.7 - Prob. 44ECh. 5.7 - Prob. 45ECh. 5.7 - Prob. 46ECh. 5.8 - Prob. 1CFUCh. 5.8 - Prob. 2CFUCh. 5.8 - Prob. 3CFUCh. 5.8 - Prob. 4CFUCh. 5.8 - Prob. 5CFUCh. 5.8 - Prob. 6CFUCh. 5.8 - Prob. 7CFUCh. 5.8 - Prob. 8CFUCh. 5.8 - Prob. 9CFUCh. 5.8 - Prob. 10CFUCh. 5.8 - Prob. 11ECh. 5.8 - Prob. 12ECh. 5.8 - Prob. 13ECh. 5.8 - Prob. 14ECh. 5.8 - Prob. 15ECh. 5.8 - Prob. 16ECh. 5.8 - Prob. 17ECh. 5.8 - Prob. 18ECh. 5.8 - Prob. 19ECh. 5.8 - Prob. 20ECh. 5.8 - Prob. 21ECh. 5.8 - Prob. 22ECh. 5.8 - Prob. 23ECh. 5.8 - Prob. 24ECh. 5.8 - Prob. 25ECh. 5.8 - Prob. 26ECh. 5.8 - Prob. 27ECh. 5.8 - Prob. 28ECh. 5.8 - Prob. 29ECh. 5.8 - Prob. 30ECh. 5.8 - Prob. 31ECh. 5.8 - Prob. 32ECh. 5.8 - Prob. 33ECh. 5.8 - Prob. 34ECh. 5.8 - Prob. 35ECh. 5.8 - Prob. 36ECh. 5.8 - Prob. 37ECh. 5.8 - Prob. 38ECh. 5.8B - Prob. 1GCECh. 5.8B - Prob. 2GCECh. 5.8B - Prob. 3GCECh. 5.8B - Prob. 4GCECh. 5 - Prob. 1SGACh. 5 - Prob. 2SGACh. 5 - Prob. 3SGACh. 5 - Prob. 4SGACh. 5 - Prob. 5SGACh. 5 - Prob. 6SGACh. 5 - Prob. 7SGACh. 5 - Prob. 8SGACh. 5 - Prob. 9SGACh. 5 - Prob. 10SGACh. 5 - Prob. 11SGACh. 5 - Prob. 12SGACh. 5 - Prob. 13SGACh. 5 - Prob. 14SGACh. 5 - Prob. 15SGACh. 5 - Prob. 16SGACh. 5 - Prob. 17SGACh. 5 - 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