Αναζήτηση Εικόνες Χάρτες Play YouTube Ειδήσεις Gmail Drive Περισσότερα »
Είσοδος
 Βιβλία Βιβλία 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. Graded Work in Arithmetic - Σελίδα 52
των Samuel Wesley Baird - 1901
Πλήρης προβολή - Σχετικά με αυτό το βιβλίο ## New Franklin Arithmetic, Βιβλίο 2

Edwin Pliny Seaver - 1895 - 429 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
...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... ## Arithmetic for Business with Short Methods and Rapid Calculations in All ...

Jacob Henry Minick, Clement Carrington Gaines - 1904 - 398 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.... ## Essentials of Arithmetic, Oral and Written

John William McClymonds, David Rhys Jones - 1907 - 324 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... ## Walton and Holmes's Arithmetics: 1st Book-, Βιβλίο 4

...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... ## Walton and Holmes's Arithmetics: 1st Book-, Βιβλίο 4

...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... 