 | Jeremiah Day - Measurement - 1815 - 388 pages
...AREA of a CIRCLE. 30. Multiply the square of the diameter by the decimals . T8 54. 9r, Multiply half the diameter into half the circumference. Or, multiply...i of the product. •• . , . • . The area of a circte is equal to the product of half the diameter into half the circumference; (Sup. Euc. 5, 1.)... | |
 | Jeremiah Day - Geometry - 1824 - 440 pages
...MULTIPLY THE SQUARE OF THE DIAMETER BY THE DECIMALS .7854. Or, MULTIPLY HALF THE DIAMETER INTO UALF THE CIRCUMFERENCE. Or, multiply the whole diameter into the whole circumference, and take \ of the product. The area of a circle is equal to the product of half the diameter into half the circumference... | |
 | Jeremiah Day - Logarithms - 1831 - 418 pages
...diameter ; and therefore, the convex surface of a hemisphere is equal to twice the area of its base. For the area of a circle is equal to the product of half the diameter into half the circumference ; (Art. 30.) that is, to -J the product of the diameter and circumference. Cor. 3. The surface of a... | |
 | Mathematics - 1836 - 488 pages
...the area of a circle. Multiply the square of the diameter by the decimals .7854. Or, multiply half the diameter into half the circumference. Or, multiply...the whole circumference;, and take i of the product. To find the area of a sector of a circle. Multiply the radius into half the length of the arc. Or,... | |
 | Adrien Marie Legendre - Geometry - 1836 - 394 pages
...But the expression £or the area will then become i • area OA— £OA x circ. OA : consequently, the area of a circle is equal to the product of half the radius into the circumference. • * Cor. 1. The area of a sector is equal to the arc of that sector... | |
 | Jeremiah Day - Geometry - 1838 - 416 pages
...diameter ; and therefore, the convex surface of a hemisphere is equal to twice the area of its base. For the area of a circle is equal to the product of half the diameter into half the circumference ; (Art. 30.) that is, to i the product of the diameter and circumference. Cor. 3. The surface of a... | |
 | Jeremiah Day - Geometry - 1839 - 434 pages
...diameter ; and therefore, the convex surface of a hemisphere is equal to twice the area of its base. For the area of a circle is equal to the product of half the diameter into half the circumference ; (Art. 30.) that is, to A the product of the diameter and circumference. Cor. 3. The surface of a... | |
 | Charles Davies - Geometrical drawing - 1840 - 262 pages
...circle greater than its diameter 1 If the diameter is 1 what is the circumference 7 Of the Circle. 37. The area of a circle is equal to the product of half the radius, into the circumference. Thus, the area of the circle, Avhose centre is C, is equal to half... | |
 | J. M. Scribner - Measurement - 1844 - 130 pages
...entire surface. Consequently, the area of a hemisphere is equal to twice the area of the base. For the area of a circle is equal to the product of half the diameter into half the circumference, or, what is the same in the result, ^ of the product of the diameter and circumference. Therefore,... | |
 | Charles Davies - Geometrical drawing - 1846 - 254 pages
...If the diameter is 1, the circumference will be 3.1416. 53. What is the area of a circle equal to ? The area of a circle is equal to the product of half the radius, into the circumference. Thus, the area of the circle whose centre is C, is equal to half the... | |
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Or, multiply the whole diameter into the whole circumference, and take i of the product. The area of a circle is equal to the product of half the diameter into half the circumference; (Sup. Euc. 5, 1.) or which is the same thing, { the product of the... 
