The Use Of The Protractor | www.mechanicaldrawingtips.com

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Drawing Home

01.Introduction
02.Your Equipment
03.T-Square
04.Two Triangles
05.Practise Drawings
06.The Protractor
07.Use Protractor
08.Scale Drawings
09.Scale Drawings
10.Drawings To Scale
11.The Instruments
12.Geometric Figures
13.Using Geometric
14.Draftsman
15.Lines + Working
16.Drawing Designs
17.Shop Drawings
18.Hand Lettering
19.Perspective
20.Isometrics
21.Sections
22.General Review

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Lesson Four-The Use Of The Protractor

1. Draw the following angles to a horizontal line:

14° 25° 39° 47° 54° 68° 77° 81°

2. Draw the following angles to a vertical line:

16° 33° 49° 66° 71° 80°

3. To any line drawn at any angle, draw a line at 48 degrees to the line at any point.

4. The base of a triangle is 3 inches long. The angle at the left is 124 degrees, and the left side is also 3 inches. What are the other two angles?

5. Construct the three triangles shown in Figure 6 and determine the lengths of the missing sides and the number of degrees in each of the missing angles.

mechanical drawing tips

Fig. 5

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