A Manual of Surveying for India, Detailing the Mode of Operations on the Revenue Surveys in Bengal and the North-western ProvincesW. Thacker, 1851 - 718 sider |
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Side 7
... produced or continued at pleasure . 3. That from any centre and with any radius the circum- ference of a circle may be described . 4. It is also required , that the equality of lines and angles to others given , be granted as possible ...
... produced or continued at pleasure . 3. That from any centre and with any radius the circum- ference of a circle may be described . 4. It is also required , that the equality of lines and angles to others given , be granted as possible ...
Side 11
... produced towards D , it will make the external angle ACD equal to the two internal opposite angles taken together ... Produce BC to any distance as D , then ( by the last Theo . ) ACD = B + A ; to both add ACB ; then ACD + ACB = A + B + ...
... produced towards D , it will make the external angle ACD equal to the two internal opposite angles taken together ... Produce BC to any distance as D , then ( by the last Theo . ) ACD = B + A ; to both add ACB ; then ACD + ACB = A + B + ...
Side 15
... produced till it meets the circle in F , that line , CF , will bisect the arc AB in the point F. Let the lines AF and BF be drawn , then in the triangles ADF , BDF ; AD = = BD ( by the last Theo . ) ; DF is com- mon , and the angle ADF ...
... produced till it meets the circle in F , that line , CF , will bisect the arc AB in the point F. Let the lines AF and BF be drawn , then in the triangles ADF , BDF ; AD = = BD ( by the last Theo . ) ; DF is com- mon , and the angle ADF ...
Side 31
... produced in E ; then draw CE , and ECB will be . the triangle required . For the triangles ADC , AEC being upon the same base AC , and under the É A D same parallel ED , ( by Cor . to Theo . 12. ) will be equal , there- fore if ABC be ...
... produced in E ; then draw CE , and ECB will be . the triangle required . For the triangles ADC , AEC being upon the same base AC , and under the É A D same parallel ED , ( by Cor . to Theo . 12. ) will be equal , there- fore if ABC be ...
Side 33
... Produce the perpendicular to D , and CD will be the tangent required . D When the given point A is without the circle . 1. Draw the line AB from the given point to the centre of the circle B , and bisect AB in the point C. 2. With the ...
... Produce the perpendicular to D , and CD will be the tangent required . D When the given point A is without the circle . 1. Draw the line AB from the given point to the centre of the circle B , and bisect AB in the point C. 2. With the ...
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Populære avsnitt
Side 7 - Things which are equal to the same thing are equal to one another. 2. If equals be added to equals the wholes are equal. 3. If equals be taken from equals the remainders are equal. 4. If equals be added to unequals the wholes are unequal. 5. If equals be taken from unequals the remainders are unequal. 6. Things which are double of the same are equal to one another.
Side 2 - But when a straight line standing upon another straight line makes the adjacent angles equal to one another, each of the angles is a right angle : (Ю.
Side 14 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Side 12 - F, which is the common vertex of the triangles: that is », together with four right angles. Therefore all the angles of the figure, together with four right angles are equal to twice as many right angles as the figure has sides.
Side 240 - Upon the same base, and on the same side of it, there cannot be two triangles that have their sides which are terminated in one extremity of the base equal to one another, and likewise those which are terminated in the other extremity.
Side 2 - When several angles are at one point B, any one of them is expressed by three letters, of which the letter that is at the vertex of the angle, that is, at the point in which the straight lines that contain the angle meet one another, is put between the other two letters, and one of these two...
Side 4 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Side 273 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Side 149 - ... to make the objects appear on the other wire ; if the contact still remains perfect, the axis of the telescope is in proper adjustment ; if not, it must be altered by moving the two screws which fasten, to the up-and-down piece, the collar into which the telescope screws. This adjustment is not very liable to be deranged.
Side 5 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees...