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 Llibres Llibres 1 - 10 de 15 sobre K. The area of each trapezoid is equal to one-half the sum of its bases multiplied.... K. The area of each trapezoid is equal to one-half the sum of its bases multiplied by its altitude, and the sum of their areas together with the area of the triangle is equivalent to the area of the polygon ABCDE F. In Fig. 318 a base line HP\s, drawn,... Plane Trigonometry - Pàgina 43
1906 - 188 pàgines
Visualització completa - Sobre aquest llibre ## Elements of plane (solid) geometry (Higher geometry) and trigonometry (and ...

1845
...Schol. If the quadrilateral is a trapezium, or has two of its sides parallel, its area is equal to half the sum of its parallel sides, multiplied by the perpendicular distance between them. Ex. In a trapezium, whose parallel sides are 20 and 8 ft., respectively, and the perpendicular distance...
Visualització completa - Sobre aquest llibre ## Elements of Drawing and Mensuration Applied to the Mechanic Arts: A Book for ...

Charles Davies - 1846 - 240 pàgines
...be 300 square feet. 17. What is the area of a trapezoid ? The area of a trapezoid is equal to half the sum of its parallel sides multiplied by the perpendicular distance between them. Thus, area AB CD = i(AB + CD) x CF. 18. With what is land generally measured? Surveyors, in measuring...
Visualització completa - Sobre aquest llibre ## Elements of Geometry, and Plane and Spherical Trigonometry: With Numerous ...

Horatio Nelson Robinson - 1860 - 453 pàgines
...the area of any plane triangle, etc. THEOREM XXXIV. The area of a trapezoid is measured by one half the sum of its parallel sides multiplied by the perpendicular distance between them. Let ABDQ represent any trapezoil ; draw the diagonal BC, dividing it into two triangles, ABC and BCD...
Visualització completa - Sobre aquest llibre ## The Complete Arithmetic: Combining Oral and Written Exercises in a Natural ...

Albert Newton Raub - 1877 - 333 pàgines
...1. The area of any parallelogram is equal to the product of its base and altitude. 2. The area of a trapezoid is equal to one-half the sum of its parallel sides, multiplied by its altitude. 1. What is the area of a room 15 ft. long, 9 ft. 6 in. wide ? Ans. 1Щ sq. ft. 2. A board...
Visualització completa - Sobre aquest llibre ## Journal of the Board of Education of the City of New York

...parallels, the triangle is equivalent to one half the parallelogram. The area of a trapezoid is measured by one-half the sum of its parallel sides multiplied by the perpendicular distance between them. The square described on the hypotenuse of any right-angled triangle is equivalent to the sum of the...
Visualització completa - Sobre aquest llibre ## The Elements of Geometry

Webster Wells - 1886 - 371 pàgines
...trapezoids Ab, Be, etc., whose common altitude is Hh, the slant height of the frustum. But the area of a trapezoid is equal to one-half the sum of its parallel sides multiplied by its altitude (§ 331). PROPOSITION XIX. THEOREM. 564. A triangular pyramid is equivalent to one-third...
Visualització completa - Sobre aquest llibre ## An Examination Manual in Plane Geometry

George Albert Wentworth, George Anthony Hill - 1894 - 138 pàgines
...twice the product of one of these sides and the projection of the other side upon it. 7. The area of a trapezoid is equal to one-half the sum of its parallel sides multiplied by its altitude. HARVARD COLLEGE, June, 1892. In solving problems use for ir the approximate value 3}....
Visualització completa - Sobre aquest llibre ## A Textbook on Surveying and Mapping ...: Arithmetic, formulas, geometry and ...

...KH, and EL are drawn perpendicular to AH, dividing the figure into trapezoids and the triangle HD K. The area of each trapezoid is equal to one-half the sum of its bases multiplied by its altitude, and the sum of their areas together with the area of the triangle...
Visualització completa - Sobre aquest llibre ## The Elements of Civil Engineering: Prepared for Students of the ..., Volum 3

...and EL are drawn perpendicular to A 77, dividing the figure into trapezoids and the triangle HD K. The area of each trapezoid is equal to one-half the sum of its bases multiplied by its altitude, and the sum of their areas together with the area of the triangle...
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