Elements of geometry and mensurationLongman, Brown, Green, and Longmans, 1854 - 192 páginas |
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Página 28
... contained by those sides are equal , the parallelograms will be equal in all re- spects . COR . 2. The two diagonals of every parallelogram bisect each other . = 4 Join AD , and let BC , AD , intersect in E ; then , since ABE = 2 DCE ...
... contained by those sides are equal , the parallelograms will be equal in all re- spects . COR . 2. The two diagonals of every parallelogram bisect each other . = 4 Join AD , and let BC , AD , intersect in E ; then , since ABE = 2 DCE ...
Página 32
... contained by the parts . [ DEF . A rectangle is said to be contained by any two of its adjacent sidest . ] A rectangle has been already defined ( 13 ) as a plane surface in the form of a parallelogram with all its angles right angles ...
... contained by the parts . [ DEF . A rectangle is said to be contained by any two of its adjacent sidest . ] A rectangle has been already defined ( 13 ) as a plane surface in the form of a parallelogram with all its angles right angles ...
Página 33
... contained ' by those sides , because nothing more is needed to determine the rectangle . The expression contained by ' is mostly , omitted ; and the rect- angle contained by any two lines , as AC , and CB , is simply called ' the ...
... contained ' by those sides , because nothing more is needed to determine the rectangle . The expression contained by ' is mostly , omitted ; and the rect- angle contained by any two lines , as AC , and CB , is simply called ' the ...
Página 34
... contained by the whole and that part , together with the square of the other part . = With the same construction as in ( 44 ) , and in the same manner it may be shewn , that BCGK , and HGFD , are the squares of BC , and AC ; and that ...
... contained by the whole and that part , together with the square of the other part . = With the same construction as in ( 44 ) , and in the same manner it may be shewn , that BCGK , and HGFD , are the squares of BC , and AC ; and that ...
Página 35
... contained by either of these sides and that part of it which is intercepted between a perpendicular let fall upon it from the vertex of the opposite angle and the acute angle . Let ABC be an acute angle of the triangle ABC ; from A draw ...
... contained by either of these sides and that part of it which is intercepted between a perpendicular let fall upon it from the vertex of the opposite angle and the acute angle . Let ABC be an acute angle of the triangle ABC ; from A draw ...
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Términos y frases comunes
ABCDEF acres base bisect breadth centre chain chord circular circum circumference circumscribing circle compasses construction contained continued fraction curved decimal Diagonal Scale diagram diameter distance divided draw drawn edge equilateral triangle find the area find the length fraction frustum given angle given circle given line given point given straight line given triangle half height Hence hexagon inscribed instrument intersecting join Let ABCD lineal unit magnitude meet multiplied number of equal number of sides number of units opposite angle parallelogram perimeter perpendicular plane surface plot points of division PROB produced PROP proportional Protractor radii radius ratio rectangle rectangular regular polygon represent right angles shew shewn similar similar triangles square feet square foot square inches straight edge subtends suppose trapezium triangle ABC vernier vertex whole yards
Pasajes populares
Página 32 - If a straight line be divided into any two parts, the square of the whole line is equal to the squares of the two parts, together with twice the rectangle contained by the parts.
Página 19 - To draw a straight line at right angles to a given straight line, from a given point in the same.
Página 27 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz.
Página 32 - If the square described upon one of the sides of a triangle, be equal to the squares described upon the other two sides of it; the angle contained by these two sides is a right angle.
Página 43 - 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.
Página 17 - If two triangles have the three sides of the one equal to the three sides of the other, each to each, the triangles are congruent.
Página 22 - Theorem. The greater side of every triangle is opposite to the greater angle. Let ABC be a triangle of which the side AC is greater than the side AB ; the angle ABC is also greater than the angle BCA. Because AC is greater than AB, make...
Página 192 - The circumference of every circle is supposed to be divided into 360 equal parts called degrees, and each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds, and these into thirds, fourths, &c.
Página 126 - Upon a given straight line to describe a segment of a circle, which shall contain an angle equal to a given rectilineal angle.
Página 20 - To draw a straight line perpendicular to a given straight line of an unlimited length, from a given point without it.