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Books Books 1 - 10 of 37 on The area of a trapezoid is equal to one-half the sum of the parallel sides multiplied....  
" The area of a trapezoid is equal to one-half the sum of the parallel sides multiplied by the altitude. "
Sheet Metal Drafting, Prepared in the Extension Division of the University ... - Page 23
by Ellsworth M. Longfield - 1921 - 236 pages
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The Normal Elementary Geometry: Embracing a Brief Treatise on Mensuration ...

Edward Brooks - Geometry - 1868 - 275 pages
...having equal altitudes are as their bases j having equal bases, they are as their altitudes. THEOREM IV. The area of a trapezoid is equal to one-half the sum of the parallel sides multiplied by the altitude. For, draw the diagonal AC, dividing the trapezoid into the...
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Elements of Plane and Solid Geometry

George Albert Wentworth - Geometry - 1877 - 402 pages
...triangles are to each other as the product of their bases by their altitudes. PROPOSITION VI. THEOREM. 327. The area of a trapezoid is equal to one-half the sum of the parallel sides multiplied by the altitude. NEC AFB Let ABC H be a trapezoid, and EF the altitude. We...
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The Complete Arithmetic: Combining Oral and Written Exercises in a Natural ...

Albert Newton Raub - Arithmetic - 1877 - 333 pages
...by Geometry : 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...
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Elements of Geometry

George Albert Wentworth - Geometry, Plane - 1879 - 250 pages
...triangles are to each other as the product of their bases by their altitudes. PROPOSITION VI. THEOREM. 327. The area of a trapezoid is equal to one-half the sum of the parallel sides multiplied by the altitude. HEC AFB Let ABC H be a trapezoid, and EF the altitude. We...
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Texas School Journal, Volume 8

Education - 1890
...angle formed by a tangt-nt and a chord is measured by one-half of the intercepted arc. :. J'l-nre: The area of a trapezoid is equal to one-half the sum of the parallel sides multiplied by the altitude. 4. Find the area of a circle inscribed in a square containing...
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Elements of Plane and Solid Geometry

George Albert Wentworth - Geometry - 1884 - 406 pages
...to each other as the product of their bases by their altitudes. PROPOSITION VI. THEOREM. 327. Thе area of a trapezoid is equal to one.half the sum of the parallel sides multiplied hil f lie altitude. II E С' AF В Let ABC H be a trapezoid, and EF the altitude....
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The Elements of Geometry

Webster Wells - Geometry - 1886 - 371 pages
...areas of the 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...
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The Elements of Solid Geometry

William C. Bartol - Geometry, Solid - 1893 - 95 pages
...their bases; any two triangles are to each other as the product of their bases by their altitudes. 366. The area of a trapezoid is equal to one-half the sum of the parallel sides multiplied by the altitude. 367. I. A circle may be circumscribed about a regular polygon....
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An Academic Arithmetic for Academies, High and Commercial Schools

Webster Wells - Arithmetic - 1893 - 339 pages
...product of its base and altitude. 3. The area of a square is equal to the square of one of its sides. 4. The area of a trapezoid is equal to one-half the sum of its bases, multiplied by its altitude. It is important to observe that, in finding the product of two...
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An Examination Manual in Plane Geometry

George Albert Wentworth, George Anthony Hill - Geometry - 1894 - 138 pages
...increased by 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...
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