 | Benjamin Greenleaf - Geometry - 1873 - 202 pages
...long is a rafter which reaches from the vertex of the roof to a corner of the building ? PROBLEM II. To find the area of a PARALLELOGRAM. Multiply the...by the altitude, and the product will be the area (Theo. V. Bk. IV.). DC 1. What is the area of a square, ABCD, whose side is 25 feet? 25 X 25 = 625... | |
 | Benjamin Greenleaf - Geometry - 1874 - 206 pages
...long is a rafter which reaches from the vertex of the roof to a corner of the building ? PROBLEM II. To find the area of a PARALLELOGRAM. Multiply the...by the altitude, and the product will be the area (Theo. V. Bk. IV.). DC 1. What is the area of a square, ABCD, whose side is 25 feet ? 25 X 25 = 625... | |
 | George Payn Quackenbos - Arithmetic - 1874 - 444 pages
...the diagonal of a square equals the square root of twice the square of its side. 685. RULES. — /. To find the area of a parallelogram, multiply the base "by the altitude. II. To find the area of a square when the diagonal is given, divide the square of the diagonal by 2.... | |
 | Benjamin Greenleaf - Arithmetic - 1876 - 344 pages
...An oblique angle is one either acute -or obtuse. 331. To find the AREA of a parallelogram. RULE. — Multiply the base by the altitude, and the product will be the area. 1. What are the contents of a board 25 feet long and 3 feet wide ? Ans. 75 square feet. 2. What is... | |
 | Malcolm MacVicar - Arithmetic - 1876 - 412 pages
...what is the elevation of the ridge above the eaves ? PROBLEMS ON QUADRILATERALS. 804. PBOB. VI. — To find the area of a parallelogram : Multiply the base by the altitude. 1. Find the area of a parallelogram whose base is 3 ft. 9 in. and altitude 7 ft. 8 in. ; whose altitude... | |
 | Edward Brooks - Arithmetic - 1877 - 528 pages
...oblique-angled parallelogram is called a Rhomboid. An equilateral / rhomboid is called a Rhombus. *— Rule. — To find the area of a parallelogram, multiply the base by the altitude. 1. What is the area of a parallelogram whose base is 35 feet and altitude 15 feet? Ans. 525 sq. ft.... | |
 | Edward Brooks - Arithmetic - 1877 - 438 pages
...A ~? is called a Rhomboid. Ail equilateral / j / rhomboid is called a Rhombus. *- — > ' Rule. — To find the area of a parallelogram, multiply the base by the altitude. 1. What is the area of a parallelogram 20 feet long and 18 feet wide ? Ans. 40 sq. yd. 2. A has a rectangular... | |
 | Edward Brooks - Arithmetic - 1877 - 232 pages
.../j- -7 is called a Rhomboid. An equilateral / i / rhomboid is called a Rhombus. 1- — ! ' Rule. — To find the area of a parallelogram, multiply the base by the altitude. 1. What is the area of a parallelogram 20 feet long and 18 feet wide? Ans. 40 sq. yd. 2. A has a rectangular... | |
 | Andrew H. Baker - Arithmetic - 1878 - 204 pages
...MEASUREMENT OP SURFACES. PROBLEMS. 1. To find the area of a rectangle, multiply the base by the altitude. 2. To find the area of a parallelogram, multiply the base by the altitude (Geometry). ' 3. To find the area of a triangle. It is also proved by Geometry that a triangle is one-half... | |
 | Samuel Mecutchen - Arithmetic - 1880 - 262 pages
...square root of the difference between the square of the hypotenuse and the square of the given side. To find the area of a parallelogram. Multiply the base by the altitude. To find the area of a trapezoid. Multiply half the sum of the parallel sides by the altitude. To find... | |
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RULE. — Multiply the base by the altitude, and the product will be the area. 
