 | George Albert Wentworth - Geometry, Solid - 1902 - 248 pages
...drawn, the tangent is the mean proportional between the whole secant and its external segment. 400. The area of a parallelogram is equal to the product of its base by its altitude. 401. Parallelograms having equal bases and equal altitudes are equivalent. 403.... | |
 | American School (Chicago, Ill.) - Engineering - 1903 - 390 pages
...195. Corollary. The area of a square is equal to the square of one of its sides. THEOREn LXIV. Ip6. The area of a parallelogram is equal to the product...its base and altitude. Let ABCD be a parallelogram leaving its altitude DF equal to a and its base AD equal to ft. To prove that ABCD = ax&: Draw AE perpendicular... | |
 | Alan Sanders - Geometry - 1903 - 392 pages
...in the rectangle is 4 x 3 or 12. The area then is 12 square feet. 588. COROLLARY I. The area of any parallelogram is equal to the product of its base and altitude. Let ABCD be any parallelogram and DE be its altitude. To Prove ABCD = AD x DE. Proof. Draw AF _L to AD, meeting... | |
 | Alan Sanders - Geometry - 1903 - 396 pages
...in the rectangle is 4 x 3 or 12. The area then is 12 square feet. 588. COROLLARY I. The area of any parallelogram is equal to the product of its base and altitude. Let A BCD be any parallelogram BE C and DE be its altitude. r To Prove ABCD = AD x DE. Proof. Draw AF _L... | |
 | George Albert Wentworth - Geometry - 1904 - 496 pages
...evident by dividing the figure into squares, each BOOK IV. PLANE GEOMETRY. PROPOSITION IV. THEOREM. 400. The area of a parallelogram is equal to the product of its base by its altitude. CF CE A b DA b D Let AEFD be a parallelogram, b its base, and a its altitude.... | |
 | Fletcher Durell - Geometry, Solid - 1904 - 232 pages
...side. BOOK IV. 383. The area of a rectangle is equal to the product of its base by its altitude. 385. The area of a parallelogram is equal to the product of its base by its altitude. 389. The area of a triangle is equal to one-half the product of its base by its... | |
 | Fletcher Durell - Geometry, Plane - 1904 - 382 pages
...area of a rectangle 8 yds. long and 5 ft. wide. BOOK IV. PLANE GEOMETRY PROPOSITION IV. THEOREM 385. The area of a parallelogram is equal to the product of its base by its altitude. KB FC Given the ZZ7 ABCD with the base AD (denoted by 6) and the altitude DF... | |
 | Walter Burton Ford, Charles Ammerman - Geometry, Plane - 1913 - 378 pages
...Find the area of each of these triangles. Ans. 15 sq. in. I A P * in < h • .ac. r 186. Theorem I. The area of a parallelogram is equal to the product of its base by its altitude. DG F._ GD Given the parallelogram ABCD with b its base and a its altitude. To... | |
 | George E. Mercer, Mabel Bonsall - Arithmetic - 1914 - 324 pages
...should be given practice in drawing them until the mention of a name calls forth an appropriate drawing. The area of a parallelogram is equal to the product of its base and altitude. The base and altitude must be expressed in units of the same kind. The diagonal of a parallelogram... | |
 | William James Milne - Arithmetic - 1914 - 524 pages
...resulting figure will be a rectangle of the same area, base, and altitude as the BASE parallelogram. The area of a parallelogram is equal to the product of its base and altitude, expressed in like units. ' ' " and Written Exercises Estimate results mentally before solving. Find... | |
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The area of a parallelogram is equal to the product of its base and altitude. 
