Explanation Formula used: The diameter of the circle is given by d = 2 r o r r = d 2 , where d is the diameter and r is the radius of the circle. Area of a circle, A = π r 2 , where r is the radius of the circle. Circumference of a circle, C = π d o r C = 2 π r , where d is the diameter and r is the radius of the circle. Calculation: It is given that the diameter of the circle is 21 ft. Substitute d = 21 ft in the formula r = d 2 and obtain the radius of the circle as shown below: r = d 2 = 21 ft 2 = 10.5 ft Thus, the radius of the circle is 10.5 ft . Use π key on the calculator to find the area and circumference as follows. Substitute r = 10.5 ft in the formula A = π r 2 and obtain the area of the circle as shown below: A = π r 2 = π ( 10

Mathematics for the Trades: A Guided Approach (10th Edition) - Standalone book

10th Edition

ISBN: 9780133347777

Author: Robert A. Carman Emeritus, Hal M. Saunders

Publisher: PEARSON

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Chapter 8.4, Problem 2BE

To determine

The circumference and area of the circle by using π key on the calculator and round the result to three significant digits.

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Chapter 8.4, Problem 1BE

Chapter 8.4, Problem 3BE

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Chapter 8 Solutions

Mathematics for the Trades: A Guided Approach (10th Edition) - Standalone book

Ch. 8.1 - A. Solve the following. If you need a protractor,...Ch. 8.1 - Use the geometry relationships to answer the...Ch. 8.1 - Use the geometry relationships to answer the...Ch. 8.1 - In each figure, two parallel lines are cut by a...Ch. 8.1 - Machine Trades A machinist receives a sketch of a...Ch. 8.1 - Carpentry A carpenter wishes to make a...Ch. 8.1 - Carpentry A carpenters square is placed over a...Ch. 8.1 - Carpentry Board 1 must be joined to board 2 at a...Ch. 8.1 - Welding In the pipe flange shown, the six bolt...Ch. 8.2 - Find the perimeter of each polygon.

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