 | Charles Austin Hobbs - Geometry, Solid - 1921 - 216 pages
...triangle is equivalent to one half of a parallelogram having the same base and altitude. Prop. 149. The area of a rectangle is equal to the product of its base and altitude. Prop. 149, Cor. The area of a square is equal to the square of its side. Prop. 150.... | |
 | Robert Franklin Anderson - Arithmetic - 1921 - 348 pages
...what you have learned. 1. The area of a square is the square of the number of units In its length. z. The area of a rectangle is equal to the product of its base and altitude. NOTE. By the product of the base and altitude, as used in the above principle, is... | |
 | Raleigh Schorling, William David Reeve - Mathematics - 1922 - 460 pages
...product of the base and altitude. We shall assume the truth of the following statements : 442. Theorem. The area of a rectangle is equal to the product of its base and altitude ; that is, A = ab. 443. Corollary 1. The area of a square is equal to the square... | |
 | Arthur Schultze, Frank Louis Sevenoak - Geometry - 1913 - 484 pages
...of its sides 20 in. Find the ratio of the areas of the two rectangles. PROPOSITION III. THEOREM 347. The area of a rectangle is equal to the product of its base and altitude. Given R a rectangle with base b and altitude a. To prove R = a X b. Proof. Let U... | |
 | James Robert Overman - Arithmetic - 1923 - 396 pages
...can be cut off and put on the other end of the figure, changing the parallelogram into a rectangle. The area of a rectangle is equal to the product of its base and altitude, so the area of the rectangle formed from the parallelogram is ABxBE (Figure 28).... | |
 | Julius J. H. Hayn - Geometry, Plane - 1925 - 328 pages
...another rectangle whose dimensions are 7 and V2. AREA OF A RECTANGLE Proposition V. Theorem 247 251. The area of a rectangle is equal to the product of its base by its altitude. Hyp.: Let R be any rectangle whose dimensions are b and a, and let U be a square... | |
 | Encyclopedias and dictionaries - 1928 - 1958 pages
...following which many practical problems will be solved to indicate how these rules and formulas are used. The area of a rectangle is equal to the product of its base and altitude. A The truth of this statement pan be readily seen by dividing the rectangle into... | |
 | M. Cottell Gregory - 1928 - 220 pages
...envelopes, most of the labor of giving the tests will be eliminated. ICI 1« Translate into a formula:- The area of a rectangle is equal to the product of its altitude and base. 2. In the formula V s lwd» if ls 20» ** 9, d» 4, find\/. IC2 1. Translate into... | |
 | Frederick Converse Beach, George Edwin Rines - Encyclopedias and dictionaries - 1911 - 910 pages
...be contained by AB and BC, or, as it is sometimes expressed, it is the rectangle under AB and B C. The area of a rectangle is equal to the product of its base and altitude. Rectangles haying equal bases are to each other as their altitudes: rectangles .having... | |
 | American Mathematical Society - Mathematics - 1907 - 682 pages
..."that at this early period the Babylonians must have been familiar with the following theorems : 1. The area of a rectangle is equal to the product of its base and altitude. 2. The area of a square is equal to the square of its side. 3. The area of a right... | |
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The area of a rectangle is equal to the product of its base and altitude. Given R a rectangle with base b and altitude a. To prove R = a X b. Proof. Let U be the unit of surface. .R axb U' Then 1x1 But - is the area of R. 
