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To find the area of a trapezoid. RULE. Multiply half the sum of the two parallel sides by the perpendicular distance between them : the product will be the area.
A System of Geometry and Trigonometry: Together with a Treatise on Surveying ... - Page 33
by Abel Flint - 1804 - 168 pages

## The Youth's Assistant in Theorhetic [sic] and Practical Arithmetic: Designed ...

Zadock Thompson - Arithmetic - 1832 - 188 pages
...16, 11 and 10 rods ; what is the area ? Ans. 54.299 rods. 307. To find the area of a trapezoid. (65) RULE.— Multiply half the sum of the two parallel sides by the perpendicular distance hetween them, and the product will he the area. , 1. One of the two parallel sides of a trapezoid is...

## The Tutor's Assistant: Being a Compendium of Practical Arithmetic, for the ...

Francis Walkingame - 1833 - 204 pages
...product will be the area. D. Fig. 5. В DE + BF x AC That is, ! = the area. For a trapezoid. Multiply the sum of the two parallel sides by the perpendicular distance between them ; and half the product will be the area. (1) How many square yards of paving are in the trapezium,...

## A treatise on practical geometry, mensuration, conic sections, gauging, and ...

Ireland commissioners of nat. educ - 1834 - 370 pages
...as follows, viz. AB 25, AD 34, D С 35, and B С 16 ; required its area ? Ans. 700-99. PROBLEM XIII. To find the area of a Trapezoid RULE. Multiply half...sides by the perpendicular distance between them, and the product will give the area.* 1. Let A BCD be a trapezoid, the side AB = r — -¡ i 40, D С...

## A Practical and Theoretical System of Arithmetic: Containing Several New ...

George Willson - Arithmetic - 1836 - 202 pages
...-figure. The Fig. 7. I breadth of the rectangle is «qual to half the sum of tha two parallel sides. RULE. — Multiply half the sum of the two parallel...sides, by the perpendicular distance between them. All the figures we have considered, have been referred either to a square or to a rectangle. The area...

## A Treatise on Mensuration for the Use of Schools

...are as follows, viz. AB 25, AD 34, DC 35, and BC 16 ; required its area. Am. 700.99. PROBLEM XIII. To find the area of a Trapezoid. RULE. Multiply half...sides by the perpendicular distance between them, and the product will give the area.* 1. Let ABCD be a trapezoid, the side AB=40, DC = 25, CP = 18,...

## A New System of Arithmetic, on the Cancelling Plan: Embracing the Rules of ...

Charles Guilford Burnham - Arithmetic - 1837 - 256 pages
...are 6, 8 and 10 chains ; what is the area? Ans., 24 chains. To find the area of a trapczoid. ROLE. Multiply half the sum of the two parallel sides by the perpendicular distance between them, and the product will be the area. 1. What is the area of a piece of land that is 30 chains long, 20...

## A Practical and Theoretical System of Arithmetic: Containing a New System of ...

George Willson - Arithmetic - 1838 - 194 pages
...figure. The "05*5" breadth of the rectangle is equal to naif the sum of the two parallel sides. . ... . RULE. — Multiply half the sum of the two parallel...sides, by the perpendicular distance between them. All the figures we have considered, have been referred either to a square or to a rectangle. The area...

## The Youth's Assistant in Theoretic and Practical Arithmetic: Designed for ...

Zadock Thompson - Arithmetic - 1838 - 174 pages
...rode ; what is the area ? Ans. 54.299 rods. 307. To find IKt etna «/ a trapezoid. (65) Itu ir. — Multiply half the sum of the two parallel sides by the perpendicular distance between them, and the product will be the ares. 1. One of the two parallel •ides of a trapezoid is 7.5 chairs,...

## Burnham's Arithmetic, Revised: A New System of Arithmetic, on an Improved ...

Charles Guilford Burnham - Arithmetic - 1841 - 324 pages
...The three sides of a triangle are 6, 8 and 10 chains. What is the area ? Answer, 24 chains. To fold the area of a trapezoid. RULE. Multiply half the sum...sides by the perpendicular distance between them, and the product will be the area. 1. What is the area of a piece of land that, is 30 chains long, 20...

## Treatise on Mensuration: For the Use of Schools

Commissioners of National Education in Ireland - Measurement - 1841 - 262 pages
...and BC 16 ; required its area? Ans. 700•99. PROBLEM XIII. To find the area of a trapezoid. II u IE Multiply half the sum of the two parallel sides by the perpendicular distance between them, and the product will give the area.* 1. Let ABCD be a ED trapezoid, the side AB =40, DC =25, CP= 18;...