 | American School (Chicago, Ill.) - Engineering - 1903 - 390 pages
...that is, B ~ tf Multiplying equations (1) and (2), we have A a X b B ~ a' x V THEOREM 1 XIII. 1 94. The area of a rectangle is equal to the product of its base and altitude. iL Let a and b be the numerical measures of the altitude and base of the rectangle... | |
 | George Albert Wentworth - Geometry - 1904 - 496 pages
...breadth. Compare their areas. and R a R' i a " S AREAS OF POLYGONS. PROPOSITION III. THEOREM. 398. The area of a rectangle is equal to the product of its base by its altitude. Let R be a rectangle, b its base, and a its altitude. To prove that the area of R = a X b.... | |
 | Fletcher Durell - Geometry, Plane - 1904 - 382 pages
...dimensions are 9X2 in. B a R' 1 S b b' 6 AREAS OP POLYGONS AREAS OF POLYGONS PROPOSITION III. THEOREM 383. The area of a rectangle is equal to the product of its base by its altitude. 1\U\ 1 Given the rectangle R, with a base containing 6, and an. altitude containing 7t units... | |
 | Fletcher Durell - Geometry, Solid - 1904 - 232 pages
...to twice the product of the given side by the projection of the median upon that side. BOOK IV. 383. The area of a rectangle is equal to the product of its base by its altitude. 385. The area of a parallelogram is equal to the product of its base by its altitude. 389.... | |
 | Fletcher Durell - Geometry - 1911 - 553 pages
...that of one whose dimensions are 9 X 2 in. R a R " 5 i AREAS OF POLYGONS PROPOSITION III. THEOREM 383, The area of a rectangle is equal to the product of its base by its altitude. Given the rectangle R, with a base containing b, and an altitude containing h units of linear... | |
 | William Betz, Harrison Emmett Webb, Percey Franklyn Smith - Geometry, Plane - 1912 - 360 pages
...the measurements are taken in inches? in yards? AREAS OF SIMPLE FIGURES 321. Fundamental Principle. The area of a rectangle is equal to the product of its base and altitude. It Thus if a and 6 are the altitude and base respectively of the rectangle whose... | |
 | William Betz, Harrison Emmett Webb - Geometry, Modern - 1912 - 368 pages
...the measurements are taken in inches? in yards? AREAS OF SIMPLE . FIGURES 321. Fundamental Principle. The area of a rectangle is equal to the product of its base and altitude. It Thus if a and b are the altitude and base respectively of the rectangle whose... | |
 | Walter Burton Ford, Charles Ammerman - Geometry, Solid - 1913 - 176 pages
...similar right triangles. CHAPTER IV AREAS OF POLYGONS. PYTHAGOREAN THEOREM 181. Area of a Rectangle. The area of a rectangle is equal to the product of its base by its height. 182. Corollary 1. The area of a square is equal to the square of its side. 183. Corollary 2.... | |
 | Walter Burton Ford, Earle Raymond Hedrick - Geometry, Modern - 1913 - 272 pages
...THEOREM 181. Area of a Rectangle. The fundamental principle, mentioned in the Introduction (§ 25), that the area of a rectangle is equal to the product of its base by its height, will be presupposed in what follows in the present chapter. The principle states that if the... | |
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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. 
