 | Edwin Pliny Seaver - 1895 - 408 σελίδες
...faces is 19£ ft. at the base and 51£ ft. high. CIRCLES. 318. A circle may be considered as made up of triangles the sum of whose bases is the circumference of the circle and whose height is the radius. Hence the area of a circle equals the product of the circum- ' ference... | |
 | George Edward Atwood - 1902 - 168 σελίδες
...can be drawn on a board 14 inches square ? AREA OF A CIRCLE A circle may be regarded as composed of a large number of triangles, the sum of whose bases is the circumference of the circle, and whose altitude is the radius. The area of a circle is equal to the product of the circumference and... | |
 | Jacob Henry Minick, Clement Carrington Gaines - 1904 - 412 σελίδες
...in diameter. How many revolutions does it make in going a mile? 452. To find the area of a Circle. A circle may be regarded as composed of a very large number of triangles, the sum of whose bases forms the circumference of the circle, and whose altitude is the radius of the circle. Hence, RULE.... | |
 | John William McClymonds, David Rhys Jones - 1907 - 352 σελίδες
...in. ; 1 mi. ; 36 rd. 281. Area of a Circle. 1. A circle may be regarded as composed of an infinite number of triangles, the sum of whose bases is the circumference of the circle and whose altitude is the radius of the circle. Therefore the area of a circle is the area of the triangles... | |
 | George Augustus Walton, Stanley Harry Holmes - 1909 - 316 σελίδες
...or ird, or 2 irr is the formula for finding any circumference. A circle may be considered as made up of triangles the sum of whose bases is the circumference of the circle and whose height is the radius. Since the circumference = 2 ,trr, the area of a circle = 2 Trr x -, or... | |
 | George Augustus Walton, Stanley Harry Holmes - 1909 - 316 σελίδες
...ir</, or 2 ir/ 1 is the formula for finding any circumference. A circle may be considered as made up of triangles the sum of whose bases is the circumference of the circle and whose height is the radius. Since the circumference = 2 irr, the area of a circle = 2 irr x -, or tir... | |
 | John William McClymonds, David Rhys Jones - 1910 - 338 σελίδες
...in. ; 1 mi. ; 36 rd. 281. Area of a Circle, 1. A circle may be regarded as composed of an infinite number of triangles, the sum of whose bases is the circumference of the circle and whose altitude is the radius of the circle. Therefore the area of a circle is the area of the triangles... | |
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A circle may be regarded as composed of an infinite number of triangles, the sum of whose bases is the circumference of the circle and whose altitude is the radius of the circle. 