An Elementary Geometry and TrigonometryThompson, Bigelow, and Brown, 1872 - 238 σελίδες |
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Σελίδα 37
... become respectively parallel ; they are therefore equiangular ( I. 12 ) and similar ( 20 ) . THEOREM IX . 22. The altitudes of two similar triangles are proportional to the homologous sides . Let BG and EH be the alti- tudes of the ...
... become respectively parallel ; they are therefore equiangular ( I. 12 ) and similar ( 20 ) . THEOREM IX . 22. The altitudes of two similar triangles are proportional to the homologous sides . Let BG and EH be the alti- tudes of the ...
Σελίδα 48
... becomes a right angle , both 66 and 67 reduce to the same as 27 ; and if C becomes a right angle , both reduce to the same as the second equation in 28 . 69. If a line is drawn from the vertex of any angle of a triangle to the middle of ...
... becomes a right angle , both 66 and 67 reduce to the same as 27 ; and if C becomes a right angle , both reduce to the same as the second equation in 28 . 69. If a line is drawn from the vertex of any angle of a triangle to the middle of ...
Σελίδα 58
... becomes C12 C = 2 R2 2 R R2 - 4 √2 R2 R√4 R2 C2 37. Cor . 2. If the diameter D , that is , 2 R , is unity , the equation in ( 36 ) becomes c = V VI C2 PROPOSITION XIII . PROBLEM . 38. To find the arithmetical 58 PLANE GEOMETRY .
... becomes C12 C = 2 R2 2 R R2 - 4 √2 R2 R√4 R2 C2 37. Cor . 2. If the diameter D , that is , 2 R , is unity , the equation in ( 36 ) becomes c = V VI C2 PROPOSITION XIII . PROBLEM . 38. To find the arithmetical 58 PLANE GEOMETRY .
Σελίδα 59
... becomes Cπ . If then we can find the circumference of a circle whose diame- ter is unity , we shall have the value of . If the diameter is unity , radius is one half , and the side of a regular hexagon inscribed in the circle is one ...
... becomes Cπ . If then we can find the circumference of a circle whose diame- ter is unity , we shall have the value of . If the diameter is unity , radius is one half , and the side of a regular hexagon inscribed in the circle is one ...
Σελίδα 99
... becomes AE : AB or ( Pn . 16 ) AF - DF - AD - AE EBAE AB : AEAE : EB 9 PROBLEM XX . 29. Through a given point in a given angle to draw a line so that the segments included between the point and the sides of the angle may be in a given ...
... becomes AE : AB or ( Pn . 16 ) AF - DF - AD - AE EBAE AB : AEAE : EB 9 PROBLEM XX . 29. Through a given point in a given angle to draw a line so that the segments included between the point and the sides of the angle may be in a given ...
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
A B C ABCDEF acute angle adjacent altitude angle BCD apothem arc or angle bisect centre chord circumference comp cone construct the triangle convex surface Corollary cosec decr diagonals diameter distance divided draw equiangular equilateral equivalent feet Find the Log frustum Geom given angle given line given point given side hypothenuse included angle incr inscribed internal angles isosceles triangle lines A B Logarithm M.
M. Sine multiplied number of sides opposite side parallelogram parallelopiped perimeter perpendicular PLANE GEOMETRY plane triangle PLANE TRIGONOMETRY prism PROBLEM quadrilateral radii radius ratio rectangle regular polygon right angle right pyramid right triangle right-angled triangle Scholium secant segment side opposite similar triangles slant height sphere square straight line Tang tangent THEOREM THEOREM VII trapezoid triangle ABC TRIGONOMETRY vertex
Δημοφιλή αποσπάσματα
Σελίδα 30 - Hence -,- = -76" dn that is a" : b" = c" : dn THEOREM IX. 23 1 If any number of quantities are proportional, any antecedent is to its consequent as the sum of all the antecedents is to the sum of all the consequents. Let a : b = c : d...
Σελίδα 49 - 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.
Σελίδα 96 - Upon a given straight line to describe a segment of a circle, which shall contain an angle equal to a given rectilineal angle.
Σελίδα 12 - In an isosceles triangle the angles opposite the equal sides are equal.
Σελίδα 11 - 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 are equal in all respects.
Σελίδα 23 - If two triangles have two sides of one respectively equal to two sides of the other, and the angles contained by those sides supplementary, the triangles are equal in area.
Σελίδα 20 - ... polygon, is equal to twice as many right angles as the polygon has sides minus two.
Σελίδα 71 - The convex surface of a right prism is equal to the perimeter of its base multiplied by its altitude.
Σελίδα 40 - At a point 200 feet from, and on a level with the base of a tower, the angle of elevation of the top of the tower is observed to be 60° : what is the height of the tower?
Σελίδα 23 - In every plane triangle, the sum of two sides is to their difference as the tangent of half the sum of the angles opposite those sides is to the tangent of half their difference.