Practical Mathematics: Instruction Paper, Volume 3American school of correspondence, 1912 |
From inside the book
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Page 87
... Rules . * ( a ) Point off the given number into periods of two figures , beginning at the decimal point . If the number contains a whole num- ber and a decimal , point off periods to the left of the decimal point for the whole number ...
... Rules . * ( a ) Point off the given number into periods of two figures , beginning at the decimal point . If the number contains a whole num- ber and a decimal , point off periods to the left of the decimal point for the whole number ...
Page 92
... Rules . ( d ) The product of the means divided by either extreme gives the other extreme ; or the product of the numerator of the second frac- tion with the denominator of the first fraction divided by the numerator of the first ...
... Rules . ( d ) The product of the means divided by either extreme gives the other extreme ; or the product of the numerator of the second frac- tion with the denominator of the first fraction divided by the numerator of the first ...
Page 94
... rules are true for both letters and numbers . 66. A direct proportion is one in which each side consists of a direct ratio . Thus , for example , a b c d is a direct ratio . 67. An inverse proportion is one in which one of the sides is ...
... rules are true for both letters and numbers . 66. A direct proportion is one in which each side consists of a direct ratio . Thus , for example , a b c d is a direct ratio . 67. An inverse proportion is one in which one of the sides is ...
Page 100
... rules indicate the proper use of the paren- thesis . Rules . ( a ) When a parenthesis is preceded by the sign the ... rule , since the quantity ( 64 ) is preceded by a minus sign the removal of the parenthesis makes it necessary to ...
... rules indicate the proper use of the paren- thesis . Rules . ( a ) When a parenthesis is preceded by the sign the ... rule , since the quantity ( 64 ) is preceded by a minus sign the removal of the parenthesis makes it necessary to ...
Page 107
... Rule : The sum of the angles of any triangle is equal to two right angles . This simple relation may be proved as follows : Let the base B C of the triangle in Fig . 27 be extended or produced to E , and the line CD be drawn parallel to ...
... Rule : The sum of the angles of any triangle is equal to two right angles . This simple relation may be proved as follows : Let the base B C of the triangle in Fig . 27 be extended or produced to E , and the line CD be drawn parallel to ...
Common terms and phrases
altitude base called characteristic circle circumference column cone conical surface cube root cubic curve shows cylinder decimal point denominator divided dividend division divisor example feet long feet per second figure Find the area Find the cube Find the logarithm Find the number Find the square Find the volume fraction given gives horizontal axis horizontal values horsepower hypotenuse kilowatt lateral area mantissa miles per hour Move the slide multiplied number of digits number of sides obtained P₁ parallelogram parallelopiped perpendicular Plot the curve polygon prism PROBLEMS FOR PRACTICE proportion pulley pyramid quadrilateral quantity quotient radius Remove the parenthesis rhombus right angles right triangle scale slant height slide rule SOLUTION spaces sphere square root straight line subtracting surface tangent term total area Transposing tungsten vertex vertical axis vertical values whole number zero
Popular passages
Page 126 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.
Page 115 - A circle is a plane figure bounded by a curved line, called the circumference, every point of which is equally distant from a point within called the center.
Page 105 - Every circumference of a. circle, whether the circle be large or small, is supposed to be divided into 360 equal parts called degrees. Each degree is divided into 60 equal parts called minutes, and each minute into 60 equal parts called seconds.
Page 115 - A circle is a plane figure contained by one line, which is called the circumference, and is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another : 16. And this point is called the centre of the circle.
Page 135 - If the characteristic is negative, make the number of zeros between the decimal point and the first significant figure of the corresponding number one less than the number of units in the characteristic.
Page 125 - The altitude of a cone is the perpendicular distance from the vertex to the base.
Page 135 - If the number is less than 1, make the characteristic of the logarithm negative, and one unit more than the number of zeros between the decimal point and the first significant figure of the given number.
Page 133 - The logarithm of the root of a number is found by dividing the logarithm of the number by the index of the root.
Page 87 - ... subtract the product from the dividend, and to the remainder annex the next period for the next dividend.
Page 106 - Polygons are classified according to the number of sides. A triangle is a polygon of three sides. A quadrilateral is a polygon of four sides. A pentagon is a polygon of five sides. A hexagon is a polygon of six sides.