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... any two parallelograms are to each other as the products of their bases by their altitudes. PROPOSITION V. THEOREM. 403. The area of a triangle is equal to half the product of its base by its altitude.
New Plane and Solid Geometry - Page 138
by Webster Wells - 1908 - 298 pages

## The Elements of Geometry

Walter Nelson Bush, John Bernard Clarke - Geometry - 1905 - 378 pages
...their bases. a. Any two rectangles are to each other as the products of their bases and altitudes. b. Any two parallelograms are to each other as the products of their bases and altitudes. SCH. A parallelogram is equal to a rectangle of the same base and altitude. c. Any two...

## Plane Geometry

Edward Rutledge Robbins - Geometry, Plane - 1906 - 268 pages
...Two parallelograms having equal bases are to each other as their altitudes. Proof: CO377. THEOREM. Any two parallelograms are to each other as the products of their bases by their altitudes. Proof: (?). 378. THEOREM. The area of a triangle is equal to half the product of its base by its altitude....

## Manual of the Free High Schools of Wisconsin

Wisconsin. Department of Public Instruction - Education - 1906 - 124 pages
...102. Two rectangles having equal bases are to each other as their altitudes. 103. Two rectangles are to each other as the products of their bases by their altitudes. 104-107. The theorems which give the areas of (1), the rectangle; (2), the parallelogram; (3), the...

## Plane and Solid Geometry

Isaac Newton Failor - Geometry - 1906 - 440 pages
...multiplied by their common altitude ; or ABCDE x H. That is, V = B x H. 0, ED 639 COROLLARY. Prisms are to each other as the products of their bases by their altitudes ; prisms having equivalent bases are to each other as their altitudes ; prisms having equal altitudes...

## Geometry: Plane Trigonometry. Chain Surveying. Compass Surveying. Transit ...

International Correspondence Schools - Building - 1906 - 634 pages
...rectangles having equal bases are to each other as their altitudes. 41. The areas of any two rectangles are to each other as the products of their bases by their altitudes. Let A and B, Fig. 27, be two rectangles whose altitudes are a and a' and whose bases are b and 6',...

## Plane and Solid Geometry

Isaac Newton Failor - Geometry - 1906 - 431 pages
...multiplied by their common altitude ; or ABODE x H. That is, V = B x H. QED 639 COROLLARY. Prisms are to each other as the products of their bases by their altitudes ; prisms having equivalent bases are to each other as their altitudes ; prisms having equal altitudes...

## Plane and Solid Geometry

Edward Rutledge Robbins - Geometry - 1907 - 428 pages
...Two parallelograms having equal bases are to each other as their altitudes. Proof: (?). 377. THEOREM. Any two parallelograms are to each other as the products of their bases by their altitudes. Proof: (?). 378. THEOREM. The area of a triangle is equal to half the product of its base by its altitude....

## Plane and Solid Geometry

Edward Rutledge Robbins - Geometry - 1907 - 428 pages
...prisms having equivalent bases are to each other as their altitudes. ( 607. THEOREM. Any two prisms are to each other as the products of their bases by their altitudes. ORIGINAL EXERCISES 1. How many faces has a parallelepiped? Edges? Vertices? How many faces has a hexagonal...