 | Abel Flint - 1804 - 226 Seiten
...Trapezium, or irregular Four Sided Figure. RULE. Draw a Diagonal between two opposite Angles, which will divide the Trapezium into two Triangles. Find the Area of each Triangle and add them together. Or, multiply the Diagonal by half the Sum of the two Perpendiculars let fall upon... | |
 | David Steel - 1805 - 392 Seiten
...and three-eighths of an inch, place the comJJ / 2 ,?4 1 G rn i ' i , 1 __ i .- \\ i3 -H ' PROBLEM 5. To find the Area of a Trapezium. RULE. Divide the trapezium into two triangles by a diagonal ; then find the areas of these triangles, by Problem 3, and add them together ; the sum... | |
 | Abel Flint - 1808 - 190 Seiten
...Trapezium^ or irregular Four Sided Figure. RULE. Draw a Diagonal between two opposite Angles, which will divide the Trapezium into two Triangles. Find the Area of each Triangle and add them together. Or, multiply the Diagonal by half the Sum of the two Perpendiculars let fall upon... | |
 | Thomas Keith - 1817 - 306 Seiten
...feet, and the length of a ladder to reach the second flooc window must be 3T5753 feet. PROBLEM VII. To find the Area of a Trapezium. RULE*. Divide the trapezium into two triangles by a diagonal drawn from two of its opposite angles; then find the areas of these triangles, and add... | |
 | Abel Flint - 1825 - 252 Seiten
...T'apezium, or trregular Four Sided Figure. RULE. Draw a Diagonal between two opposite Angles, which will divide the Trapezium into two Triangles. Find the Area of each Triangle and add them together. Or, multiply the Diagonal by half the Sum of the two perpendiculars let fall upon... | |
 | Ireland commissioners of nat. educ - 1834 - 370 Seiten
...on the 30 foot wall ? Ans. 31-9956 height of waif, and 15-484 the breadth of the house. PROBLEM XL To find the area of a Trapezium. RULE. Divide the trapezium into two triangles, by joining two of its opposite angles ; find the area of each triangle ; and the sum of both areas... | |
 | Abel Flint - 1835 - 366 Seiten
...trapezium, or irregular four sided figure. RULE. Draw a diagonal between two opposite angles, which will divide the trapezium into two triangles. Find the area of each triangle and add them together. Or, multiply the diagonal by half the sum of the two perpendiculars let fall upon... | |
 | Commissioners of National Education in Ireland - 1837 - 290 Seiten
...greater segment 9*2 186 feet, lesser segment 6-40 18 feet, and length of the prop 37-68 feet. PROBLEM XI. To find the area of a Trapezium. RULE. Divide the trapezium into two triangles, by joining two of its opposite angles ; find the area of each triangle, and the sum of both areas will... | |
 | Commissioners of National Education in Ireland - 1837 - 284 Seiten
...9-2 1 86 feet, lesser segment 6-40 1 8 feet, and length of the prop 37-68 feet. PROBLEM XI. To fotd the area of a Trapezium. RULE. Divide the trapezium into two triangles, by joining two of its opposite angles ; find the area of each triangle, and the sum of both areas will... | |
 | Henry Pickton - 1847 - 84 Seiten
...required the area of one side. ft. in. Here 80 0 10 5 800 0 33 4 833 4 Ans. 833 feet, 4 inches. Prob. XII. To find the area of a trapezium. Rule. Divide the trapezium into two triangles, find the area of these by Prob. VII., the sum of which is the required area. Prob. XIII. To find the area of a trapezoid.... | |
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To find the area of a trapezium. RULE. — Divide the trapezium into two triangles by a diagonal, and then find the areas of these triangles ; their sum will be the area of the trapezium. 
