First Lessons in Geometry: With Practical Applications in Mensuration, and Artificers' Work and MechanicsA.S. Barnes, 1840 - 252 σελίδες |
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Αποτελέσματα 1 - 5 από τα 17.
Σελίδα 20
... division marked 40 , we draw CE , then , the angle ECB will be equal to 40 degrees . If 180 90 80 F 40 E B QUEST . - 6 . What is the circumference of a circle ? Make one , and point out the centre . 7. For what is the circumference of a ...
... division marked 40 , we draw CE , then , the angle ECB will be equal to 40 degrees . If 180 90 80 F 40 E B QUEST . - 6 . What is the circumference of a circle ? Make one , and point out the centre . 7. For what is the circumference of a ...
Σελίδα 21
... division marked 80 , it will make with CB an angle equal to 80 degrees . 9. If two lines AB , DE , are per- pendicular to each other , the four an- gles BCD , DCA , ACE , and ECB will be equal . These two lines will divide the ...
... division marked 80 , it will make with CB an angle equal to 80 degrees . 9. If two lines AB , DE , are per- pendicular to each other , the four an- gles BCD , DCA , ACE , and ECB will be equal . These two lines will divide the ...
Σελίδα 91
... divisions ? What is generally taken for the unit of scales of equal parts ? Explain the manner of taking from the scale of equal parts the distance two inches and six - tenths ? Practical Geometry . - Problems . Let it be required PART ...
... divisions ? What is generally taken for the unit of scales of equal parts ? Explain the manner of taking from the scale of equal parts the distance two inches and six - tenths ? Practical Geometry . - Problems . Let it be required PART ...
Σελίδα 92
... divisions : the dividers will then embrace the required distance . PROBLEM V. To lay down , on paper , a line of a given length , so that any number of its parts shall correspond to the unit of the scale . 9. Suppose that the given line ...
... divisions : the dividers will then embrace the required distance . PROBLEM V. To lay down , on paper , a line of a given length , so that any number of its parts shall correspond to the unit of the scale . 9. Suppose that the given line ...
Σελίδα 95
... division draw parallels to ab as in the figure . Now , the small divisions of the line ab are each one tenth ( 1 ) of ab ; they are therefore , 1 of ad , or , 1 of ag or gh . If we consider the triangle adf , the base df is one tenth of ...
... division draw parallels to ab as in the figure . Now , the small divisions of the line ab are each one tenth ( 1 ) of ab ; they are therefore , 1 of ad , or , 1 of ag or gh . If we consider the triangle adf , the base df is one tenth of ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
12 feet 20 feet acres altitude bisect bounded by Planes breadth called centre of gravity chord circular sector circumfer circumference cone convex surface cubic feet cubic foot cubic inches cylinder decimal diagonals diameter distance divide draw equilateral triangle EXAMPLES Explain the manner feet 6 inches figure find the area find the solidity frustum given angle given line given point gles half hypothenuse intersect line be drawn linear unit lower base manner of inscribing Mensuration of Surfaces multiplied number of square parallel planes parallelogram parallelopipedon pentagon pentagonal pyramid perpendicular Practical Geometry.-Problems PROBLEM pulley pyramid radius rectangle regular polygon regular solids Required the area rhombus right angled triangle Round Bodies RULE scale of equal secant line segment similar polygons similar triangles slant height solid content solid feet Solids bounded specific gravity sphere square feet square yards straight line tangent thickness upper base weight
Δημοφιλή αποσπάσματα
Σελίδα 20 - 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.
Σελίδα 32 - The area of a rectangle is equal to the product of its base and altitude. Given R a rectangle with base b and altitude a. To prove R = a X b. Proof. Let U be the unit of surface. .R axb U' Then 1x1 But - is the area of R.
Σελίδα 40 - Similar triangles are to each other as the squares described on their homologous sides. Let ABC, DEF be two similar triangles...
Σελίδα 82 - A zone is a portion of the surface of a sphere included between two parallel planes.
Σελίδα 235 - An equilibrium is produced in all the levers, when the weight multiplied by its distance from the fulcrum is equal to the product of the power multiplied by its distance from the fulcrum. That...
Σελίδα 84 - The convex surface of a cylinder is equal to the circumference of its base multiplied by its altitude.
Σελίδα 34 - The area of a triangle is equal to half the product of the base and height.
Σελίδα 35 - If two triangles have two sides and the included angle of the one, equal to two sides and the included angle of the other, each to each, the two triangles will be equal in all their parts." Axiom 1. "Things which are equal to the same thing, are equal to each other.
Σελίδα 20 - For this purpose it is 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. The degrees, minutes, and seconds, are marked thus, °, ', " ; and 9° 18' 10", are read, 9 degrees, 18 minutes, and 10 seconds.
Σελίδα 83 - The surface of a sphere is equal to the product of its diameter by the circumference of a great circle.