ENGINEER’s MEASURE TO CARPENTER’s MEASURESome construction drawings have dimensions in engineer’s measurementsinstead of carpenter’s measurements. Engineer’s measurements are based on feetand decimal parts of a foot, where as Carpenter’s measure is based on feet, inches,and fractions of an inch. You must know how to convert an engineer’s measure toa carpenter’s measure. For example, using the carpenter’s rule (3-4-5) many timesyour calculation will be in engineer’s measure such as the diagonal of a right trianglebeing 12.65', and you can not find 12.65' on your tape measure, so you must convertthis to inches and fractions of an inch (1/32, 1/16, 1/8, 1/4). As Builder’s we tryand convert all dimensions to the nearest sixteenth of an inch.Convert 12.65' to feet, inches, and sixteenths of an inch.You already know that feet a is given (12') now, you need to convert the decimalpart of a foot (.65') into inches and sixteenths of an inch by multiplying .65' by 12''.Now, you have converted the .65' to inches which is (7'') with a remainder of.80''. Next, convert .80'' to sixteenths of an inch by multiplying .80 x 16.Now that you have converted .80'' to sixteenths of an inch which is (12.80/16),you can not leave this equation like it is without rounding off. In this example youmust round up to (13). So the answer to this calculation is:Answer: 12'7 13/16''ANGLESAngles are of four types:1.2.3.4.Right angle—a 90° angle.Acute angle—an angle less than 90°.Obtuse angle—an angle greater than 90°, but less than 180°.Reflex angle—an angle greater than 180°.AREASAll areas are measured in squares.The area of a square is the product of two of its sides and since both sides areequal, it may be said to be the square of its side.NOTE: The area of any plane surface is the measure of the number of squarescontained in the object. The unit of measurement is the square of the unit whichmeasures the sides of the square.AI-12