 | Norman Colman Riggs - Geometry, Analytic - 1910 - 318 pages
...215°). The area required is the sum of the areas of the triangles OP2P„ OP,P3, OP3P2 (Fig. 32). The area of a triangle is equal to one half the product of two sides and the sine of the included angle. ,P, (3,60°) >P2 (-2, 125°) ,----~" "P. (5,215°) Fio.... | |
 | Bruce Mervellon Watson, Charles Edward White - Arithmetic - 1911 - 424 pages
...parallelogram compare ? How do the altitude of the parallelogram and of the triangle compare ? 254. The area of a triangle is equal to one half the product of its base and altitude expressed in the same denomination. 255. Oral Find the areas of triangles having dimensions as follows: 1. 2. 3. 4. 5. BASE... | |
 | Charles William Morey - Arithmetic - 1911 - 274 pages
...each triangle is what part of the area of the parallelogram ? What is the area of each triangle ? The area of a triangle is equal to one half the product of its base and its altitude. To find the area of a triangle, we find one half the product of its base and its altitude.... | |
 | Charles W. Morey - Arithmetic - 1911 - 452 pages
...triangle and whose altitude is one half of the altitude of the triangle. FIG uitu 2 FIG ÜBE 3 The area of a triangle is equal to one half the product of its base and its altitude. Find areas of these triangles : BASH ALTITUD« BARB ALTITÜDE 16. The base of a right-angled... | |
 | Clara Avis Hart, Daniel D. Feldman - Geometry, Modern - 1911 - 328 pages
...the area of triangle ABC; the altitude upon b ; the altitude upon c. PROPOSITION V. THEOREM 491. The area of a triangle is equal to one half the product of its perimeter and the radius of the inscribed circle. A b c Given A ABC, with area T, sides a, b, and c,... | |
 | Norman Colman Riggs - Geometry, Analytic - 1911 - 330 pages
...215°). The area required is the sum of the areas of the triangles OP2P,, OPiP3, OP3P2 (Fig. 32). The area of a triangle is equal to one half the product of two sides and the sine of the included angle. ,P, (3, 60°) P2 (-2, 125°) FIG. 32. .'. the required... | |
 | James Charles Byrnes, Julia Richman, John Storm Roberts - Arithmetic - 1911 - 328 pages
...What are the dimensions of each of the triangles ? What is the area of each triangle ? 224. RULE. The area of a triangle is equal to one half the product of the base by thc altitude : WRITTEN PROBLEMS 225. i. Find the area of a square whose side is 8 in. 2.... | |
 | Robert Louis Short, William Harris Elson - Mathematics - 1911 - 216 pages
...find that in volume theorems the ratios involved the products of three lines. THEOREM LIII 207. Tlie area of a triangle is equal to one half the product of the base and altitude. Draw A ABC. Through C draw II to AB. Through B draw II to AC. A parallelogram... | |
 | Clara Avis Hart, Daniel D. Feldman - Geometry - 1912 - 504 pages
...area of triangle ABC ; the altitude upon b ; the altitude upoii c. PROPOSITION V. THEOREM 491. The area of a triangle is equal to one half the product of its perimeter and the radius of the inscribed circle. Given A ABC, with area '/; sides a, b, and c, and... | |
 | Clara Avis Hart, Daniel D. Feldman, Virgil Snyder - Geometry, Solid - 1912 - 216 pages
...bases. 485. The area of a triangle equals one half the product of its base and its altitude. 491. The area of a triangle is equal to one half the product of its perimeter and the radius of the inscribed circle. 492. The area of any polygon circumscribed about... | |
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The area of a triangle is equal to one half 'the product of its base and altitude. 
