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" To find the area of a triangle. — Multiply the base by the perpendicular height, and half the product will be the area. "
Beginners' Algebra - Page 159
by Clarence Elmer Comstock, Mabel Sykes - 1922 - 303 pages
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The principles of architecture, Volume 1

Peter Nicholson - 1809 - 426 pages
...the' area of a rhomboides ABCD, whose length AB is l6f. 3i. and the height DE 5f. 6i. ? PROBLEM II. To find the area of a triangle. Multiply the base by the perpendicular height, and half the product will be the area. EXAMPLE 1. I What is the area of a triatgk...
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A Popular Course of Pure and Mixed Mathematics ...: With Tables of ...

Peter Nicholson - Mathematics - 1825 - 1046 pages
...16 3 1625 5 6 55 D С 9 81 8125 8125 f. 89.375 Л 89 4 6 f. i ii Ans. 89 ft. 4 in. 6 parts. Prob. 2. To find the area of a triangle. Multiply the base by the perpendicular height, and half the product will be the area. Ex. What is the area of a triangle ABC,...
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The Operative Mechanic, and British Machinist: Being a Practical Display of ...

John Nicholson (civil engineer.) - Great Britain - 1825 - 1008 pages
...the area of a rhombus, whose length is 6 chains, and perpendicular height 5. - 5 5 Ansr. 30 Proli. 2. To find the Area of a Triangle. /.'•'/..• ]. Multiply the base by the perpendicular height, and half the product will be the area. Rule 2. When the three sides only are...
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The Arithmetical Manual

Samuel Read Hall - Arithmetic - 1832 - 294 pages
...breadth, or height, and the product will be the area • as above, 8 ft. X 3=24, the area of ABCD. To find the area of a Triangle, — Multiply the base by the perpendicular height, and take half the product for the area. The reason for the above rule will be...
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Principles of Architecture: Comprising Fundamental Rules of the Art, with ...

Peter Nicholson, Joseph Gwilt - Architectural drawing Technique - 1848 - 750 pages
...16 3 16-25 56 56 5-5 8125 8125 Ans. 89 4 6 89 4 6 f. S'J-375 f. i ii f. i ii PROBLEM II. PLATE 50. To find the area of a triangle. Multiply the base by the perpendicular height, and half the product will be the area. EXAMPLE I. What is the area of a triangle...
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The Teacher's Aid, Containing the Solution of a Variety of the Most ...

Goodwin Mitchell - Arithmetic - 1849 - 224 pages
...length by the breadth, or multiply the side and end together, and the product will be the area. (22) To find the area of a triangle : Multiply the base by the perpendicular height of the triangle, and half the product will be the area ; or multiply the perpendicular...
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The Practical Model Calculator: For the Engineer, Mechanic, Machinist ...

Oliver Byrne - Engineering - 1851 - 310 pages
...10-52 x 7-63 = 80-2676; 80-2676 and — ^ — = 8-02676 acres = 8 ac. 10 0 ro. <ipo. area required. A To find the area of a triangle. — Multiply the base by the perpendicular height, and half the product will be the area. The perpendicular height of the triangle...
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The course of arithmetic as taught in the Pestalozzian school, Worksop ...

J L. Ellenberger - 1854 - 336 pages
...height. For a parallelogram has the same area as a rectangle of the same base and the same height. 402. To find the area of a triangle, multiply the base by the vertical height, and half the product, will be the area ; any side may be taken as the base of the...
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The Practical Model Calculator, for the Engineer, Mechanic, Machinist ...

Oliver Byrne - Engineering - 1863 - 600 pages
...10-52 x 7-63 = 80-2676 ; 80-2676 and — T7i— = 8-02676 acres = 8 ac. 10 0 ro. 4po. area required. To find the area of a triangle. — Multiply the base by the perpendicular height, and half the product will be the area. The perpendicular height of the triangle...
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Manual of Geometry and Conic Sections: With Applications to Trigonometry and ...

William Guy Peck - Conic sections - 1876 - 376 pages
...Surfaces considered. 4°. To find the area of a plane Mangle when the base and altitude are given. RULE. Multiply the base by the altitude, and divide the result by 2, (P. 4,8.4). EXAMPLES. 1. What is the area of a triangle whose base is 1300 ft., and whose altitude...
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