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" Hence, The area of a rectangle is equal to the product of the length by the breadth. "
New Elementary Arithmetic: Embracing Mental and Written Exercises for ... - Σελίδα 130
των Benjamin Greenleaf - 1879 - 224 σελίδες
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Junior High School Mathematics ...

John Charles Stone - 1921
...Thus, in finding the area of a rectangle, you learned in arithmetic that The number of square units in the area of a rectangle is equal to the product of the number of linear units in its base and altitude. You learned in Books I and II that this is more quickly...

A Course in Arithmetic for Teachers and Teacher-training Classes

James Robert Overman - 1923 - 376 σελίδες
...rules of mensuration afford excellent opportunity for such practice. Thus the pupils discover that, The area of a rectangle is equal to the product of the base and the altitude. The possibility of writing this rule in an abbreviated form is next considered....

The Pilot Arithmetics, Τόμος 3

1924
...method of finding the area of a rectangle by the formula : A = b X h This is a short way of saying that the area of a rectangle is equal to the product of the base by the altitude. The result is expressed in square units. Before applying the formula, A = 6 X...

The Nature and Growth of Modern Mathematics

Edna Ernestine Kramer - 1982 - 758 σελίδες
...fence are x ft. in length, and the third side must be 4000 — 2x. Let us call the area y. Then, since the area of a rectangle is equal to the product of the length by the width, y = x(4000 - 2x) y = 4000* - 2x2 Now, it is just this quantity y, or 4000* — 2x2, which we...
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Geometry - Plane, Solid and Analytic Problem Solver

Research & Education Association Editors, Ernest Woodward - 2012 - 1080 σελίδες
...dimensions I by h while two other opposing faces will have dimensions w by h. Based on the concept that the area of a rectangle is equal to the product of the lengths of its sides, it is correct to determine the lateral surface area by the equation fch + wh...
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The Best Coaching and Study Course for the SAT I: Scholastic Assessment Test ...

Robert Andrew Bell - 1994 - 994 σελίδες
...the shaded region is equal to the area of rectangle ABCD minus the area of triangle EBC. Recall that the area of a rectangle is equal to the product of the measure of its length and the measure of its width. Thus, Area of rectangle ABCD = (AB) (BC) The area...
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REA's Practical Help for Pre-algebra

Sally H. Spetz, Staff of Research Education Association - 2002 - 226 σελίδες
...the shaded region is equal to the area of rectangle ABCD minus the area of triangle EBC. Recall that the area of a rectangle is equal to the product of the measure of its length and the measure of its width. Thus, Area of rectangle ABCD = (AB) (BC) The area...
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Southern School Journal, Τόμος 18

1907
...with abstract numbers, but in this case do not say, "length times breadth gives area," but rather, "The area of a rectangle is equal to the product of the numbers expressing length and breadth." Pupils often have trouble with problems in which the area and...

Principles and Methods of Teaching Arithmetic

James Robert Overman - 1920 - 340 σελίδες
...inches and counting. Generalization. Having verified their hypothesis the pupils formulate the rule, "The area of a rectangle is equal to the product of the base and the altitude." This rule should also be stated in abbreviated form as A=ay.b. Application....




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