 | Benjamin Greenleaf - Arithmetic - 1839 - 356 pages
...base of a rhombus being 12 feet, and its height 8 feet. Required the area. Ans. 96 feet. PROBLEM m. To find the area of a triangle. RULE. — Multiply the base by half the perpendicular height ; or add the three sides together; then take half of that sum, and out... | |
 | Frederick Augustus Griffiths - 1840 - 436 pages
...required Area, or Surface. To find the Area of a Triangle, its base, and perpendicular height being given. Multiply the base by the perpendicular height, and half the product will be the Area. Example. — Required the number of square yards contained in a Triangle, whose base is 20 yards, and... | |
 | Benjamin Greenleaf - Arithmetic - 1841 - 334 pages
...base of a rhombus being 12 feet, and its height 8 feet. Required the area. Ans. 96 feet. PROBLEM III. To find the area of a triangle. RULE. — Multiply the base by half the perpendicular height; or add the three sides together; then take half of that sum, and out... | |
 | Osman Call - Arithmetic - 1842 - 210 pages
...area. What is the area of a rhomboid, the length being 7, and the perpendicular being 4 ? Ans. 28. TO FIND THE AREA OF A TRIANGLE. RULE. — Multiply the base by the perpendicular height, and take half the product for the area. What is the area of a triangle, the base being 9, and the perpendicular... | |
 | Benjamin Greenleaf - Arithmetic - 1842 - 184 pages
...breadth, and the product is the superficial contents. 2. To find the area of a rhombus or a rhomboid. 3. To find the area of a triangle. RULE. Multiply the base by half the perpendicular height; or, add the three sides together ; then take half of that sum, and out... | |
 | Benjamin Greenleaf - Arithmetic - 1844 - 208 pages
...area of a rhombus or rhomboid. RULE. Multiply the length of the base by the perpendicular height. 3. To find the area of a triangle. RULE. Multiply the base by half the perpendicular height ; or, add the three sides together ; then take half of that sum, and... | |
 | Benjamin Greenleaf - Arithmetic - 1844 - 204 pages
...area of a rhombus or rhomboid. RULE. Multiply the length of the bose by the perpendicular height. 3. To find the area of a triangle. RULE. Multiply the base by half the perpendicular height ; or, add the three sides together ; then take half of that sum, and... | |
 | Nathan Scholfield - 1845 - 894 pages
...breadth of a rhomboid, whose area = 65 J square feet, the length 12J feet. Ans. 5 ft. 4 in. PROBLEM u. To find the area of a triangle. RULE. — Multiply the base by the perpendicular height, and take half ihe product for the area, (Prop. VIII. B. IV.) Schol. — If the area of a triangle be divided... | |
 | Charles William Hackley - Geometry - 1847 - 248 pages
...breadth 5 feet 3 inches. Ans. 21T\ square yards. PROBLEM II. To find the area of a triangle. RULE I. Multiply the base by the perpendicular height, and half the product will be the area.* Or, multiply the one of these dimensions by half the other. little squares, or the area of the figure,... | |
 | William Vogdes - Arithmetic - 1847 - 324 pages
...perpendicular height 19 chains : required the area. PROBLEM X. To find the area of a triangle. ROLE. Multiply the base by the perpendicular height, and half the product will be the area. EXAMPLES. 1. What is the area of a triangle whose base is 37 feet, and height 23 feet ? (37x23)-=-2=425.5... | |
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To find the Area of a Triangle. Rule ] . Multiply the base by the perpendicular height, and half the product will be the area. 
