 | Euclid, Dionysius Lardner - 1828 - 542 стор.
...parallelogram having the same base and altitude, and that of a triangle is equal to half that urea, it follows that the area of a parallelogram is the product of its base and its altitude, and that of a triangle is equal to half that product. The phrase ' the product of two... | |
 | James S. Russell - 1847 - 340 стор.
...its angles right ; 25. The Rhomboid, which has its opposite sides equal and its angles oblique. 26. The area of a parallelogram is the product of its base and altitude, which, in case of the square, is the second power of its side, (19&.) * The demonstration... | |
 | Nathan Fellowes Dupuis - 1889 - 370 стор.
...of the last article in conjunction with Section I. of this Part give us the following theorems. i. The area of a parallelogram is the product of its base and altitude. (140°) 2. The area of a triangle is one-half the product of its base and altitude. (141°)... | |
 | Henry Holmes Belfield - 1891 - 362 стор.
...parallelogram ABC D. The altitude of a trapezoid is the perpendicular distance between its parallel sides. 576. The area of a parallelogram is the product of its base and altitude. 1. Find the area of a parallelogram whose base is 30 ft. and whose altitude is 10 ft. 2.... | |
 | Middlesex Alfred Bailey - 1892 - 176 стор.
...Eau«, «ray point of which is equally distant from a point within «aU«d tb* «enter. 53. RULES. The area of a parallelogram is the product of its base and altitude. The area of a trapezoid is half the product of its altitude and the sum of its parallel sides.... | |
 | Nathan Fellowes Dupuis - 1894 - 313 стор.
...of the last article in conjunction with Section I. of this Part give us the following theorems. 1. The area of a parallelogram is the product of its base and altitude. (I4o°) 2. The area of a triangle is one-half the product of its base and altitude. (141°)... | |
 | 1911 - 946 стор.
...its altitude; ie, a — bh. [PI, 2, 3.] (Tliis formula may lie taken as the definition of area.) 2. The area of a parallelogram is the product of its base and ;ts altitude; ie, a = bh. [P4.] 3. The area of a triangle is one half the, product of its base and... | |
 | John Williston Cook, Nebraska Cropsey - 1906 - 390 стор.
...Its area is BO x PQ. Evidently the rectangle and the parallelogram have the same area. 399. Hence, the area of a parallelogram is the product of its base and altitude. Verify the above by actually making a cardboard parallelogram and cutting it as indicated.... | |
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The area of a parallelogram is the product of its base and its altitude ; ie, a=bh. 
