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" Geometry that the area of a triangle is equal to one-half the product of the base by the altitude. Therefore, if a and... "
Mensuration - Page 2
by William Shaffer Hall - 1893 - 62 pages
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Elements of Plane Geometry: For the Use of Schools

Nicholas Tillinghast - Geometry, Plane - 1844 - 108 pages
...points of division E, G, &c. draw lines parallel to AB, and there will be as many squares formed, as the product of the number of linear units in the base, by the number of the same units in the altitude. In the case before us, the area contains thirtytwo times the superficial...
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Elements of Plane Geometry: For the Use of Schools

Nicholas Tillinghast - Geometry, Plane - 1844 - 108 pages
...CD," or, shortly, "AB into CD." PROP. I. THEOREM. The area of a rectangle is obtained by multiplying the number of linear units in the base, by the number of the same linear units in the altitude. . Fig. 58. Let the base of the rectangle ABCD contain a certain...
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First Lessons in Geometry: Upon the Model of Colburn's First Lessons in ...

Alpheus Crosby - Geometry, Plane - 1851 - 192 pages
...? In all cases, then, can you obtain the number of superficial units in a rectangle, by multiplying the number of linear units in the base, by the number of linear units in thej tude? § 170. THEOR. II. The measure of a recta is the product of its base and altitude. [Proved...
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The Practical Arithmetic on the Inductive Plan: Including Oral and Written ...

William James Milne - Arithmetic - 1877 - 402 pages
...every triangle is one-half of a parallelogram of the same base and altitude. Therefore, RULE. — The area of a triangle is equal to one-half the product of the base by the altitude. When the three sides are given, the following is the rule: RULE. — From half...
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Plane and Spherical Trigonometry

George Albert Wentworth - Trigonometry - 1882 - 160 pages
...23"' В =11° 29' TRIGONOMETRY. § 16. AREA OF THE RIGHT TRIANGLE. It is shown in Geometry that the area of a triangle is equal to one-half the product of the base by the altitude. Therefore, if a and b denote the legs of a right triangle, and F the area, F=\ab....
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Plane and Spherical Trigonometry: G. A. Wentworth ...

George Albert Wentworth - Trigonometry - 1884 - 330 pages
...44' 21" B =11° 29' A =7S°31' § 16. AREA OF THE RIGHT TRIANGLE. It is shown in Geometry that the area of a triangle is equal to one-half the product of the base by the altitude. Therefore, if a and b denote the legs of a right triangle, and .Fthe area, ,-,_...
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Plane Trigonometry

George Albert Wentworth - 1887 - 206 pages
...=11° 29' A =78° 31' TRIGONOMETRY. § 16. ABEA OF THE RIGHT TRIANGLE. It is shown in Geometry that the area of a triangle is equal to one-half the product of the base by the altitude. Therefore, if a and b denote the legs of a right triangle, and F the area, F=lab....
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Five-place Logarithmic and Trigonometric Tables

George Albert Wentworth - 1887 - 346 pages
...B =5° 44' 21" B TRIGONOMETRY. § 16. AREA OF THE RIGHT TRIANGLE. It is shown in Geometry that the area of a triangle is equal to one-half the product of the base by the altitude. Therefore, if a and b denote the legs of a right triangle, and area, By means...
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Report of the Superintendent of Public Instruction

Michigan. Department of Public Instruction - Education - 1892 - 524 pages
...the triangle, and its area. 7. What is a circle? A radius? An equilateral polygon? 8. Prove that the area of a triangle is equal to one-half the product of the base and altitude. ARITHMETIC. [First and Second Gtadee.] 1. Make and solve a problem illustrating...
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Trigonometry, Surveying and Navigation

George Albert Wentworth - Navigation - 1895 - 436 pages
...Case IV. See also § 12, Note. § 14. AREA OF THE RIGHT TRIANGLE. It is shown in Geometry that the area of a triangle is equal to one-half the product of the base by the altitude. Therefore, if a and b denote the legs of a right triangle, and F the area, ™...
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