Elements of Plane Geometry, Μέρος 1Harper & Brothers, 1878 - 132 σελίδες |
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Αποτελέσματα 1 - 5 από τα 13.
Σελίδα 22
... fall on the point F , and the line AC upon DF ; and since AC is equal to DF the point A must coincide with the point D ; since AC coincides with DF , and the angle ACB is equal to the angle DFE , the line CB must coincide with the line ...
... fall on the point F , and the line AC upon DF ; and since AC is equal to DF the point A must coincide with the point D ; since AC coincides with DF , and the angle ACB is equal to the angle DFE , the line CB must coincide with the line ...
Σελίδα 23
... fall somewhere on the line EF . Now , since the point C falls at the same time upon the lines DF and EF , and since it can not fall in two places at the same time , it must fall at their point of intersection , F. Therefore the points C ...
... fall somewhere on the line EF . Now , since the point C falls at the same time upon the lines DF and EF , and since it can not fall in two places at the same time , it must fall at their point of intersection , F. Therefore the points C ...
Σελίδα 26
... fall a perpendicular to the line . K C Let AB be a given line and Ca point without it ; it is required to draw a perpendicular line from C to AB . Take any point F on the opposite side of the given line , and from the centre C , with ...
... fall a perpendicular to the line . K C Let AB be a given line and Ca point without it ; it is required to draw a perpendicular line from C to AB . Take any point F on the opposite side of the given line , and from the centre C , with ...
Σελίδα 45
... fall the perpendicular AE ; prolong AE until D ED is equal to it . Join D and B , and A and F. Then the required angles are AFE and BFK . * It is supposed that the student is sufficiently familiar with the prob- lems required in this ...
... fall the perpendicular AE ; prolong AE until D ED is equal to it . Join D and B , and A and F. Then the required angles are AFE and BFK . * It is supposed that the student is sufficiently familiar with the prob- lems required in this ...
Σελίδα 46
... fall at a given point and the base fall in a given line . 7. Given the perpendicular of an equilateral triangle , to construct it . 8. Given the diagonal of a square , to construct it . 9. To construct an isosceles triangle , so that ...
... fall at a given point and the base fall in a given line . 7. Given the perpendicular of an equilateral triangle , to construct it . 8. Given the diagonal of a square , to construct it . 9. To construct an isosceles triangle , so that ...
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD AC and BD AC and CB AC is equal ACEH adjacent angle allel alternate angles altitude angle ABC angle ACB angle BAC angle equal base centre chord circumference diagonal diameter draw equal angles equal const equal Prop equal to DF equiangular equilateral triangle exterior angle feet Find the area Geometry given line given point gles greater half the arc Hence the triangles hypothenuse included angle inscribed interior and opposite isosceles triangle Join the points Let ABC lines AC measured by half opposite angle parallelogram perpendicular point F polygon proportional PROPOSITION Prove quadrilateral radius rectangle rectangle contained Required the area rhombus right angles Prop right-angled triangle Scholium secant secant line segment side AC similar six right square tangent TEST EXAMPLES three sides trapezium triangle ABC
Δημοφιλή αποσπάσματα
Σελίδα 48 - 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 26 - PROB. from a given point to draw a straight line equal to a given straight line. Let A be the given point, and BC the given straight line : it is required to draw from the point A a straight line equal to BC.
Σελίδα 46 - 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.
Σελίδα 45 - If one side of a triangle be produced, the exterior angle is greater than either of the interior, and opposite angles.
Σελίδα 63 - If there be two straight lines, one of which is divided into any number of parts, the rectangle contained by the two straight lines is equal to the rectangles contained by the undivided line, and the several parts of the divided line. Let...
Σελίδα 64 - 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.
Σελίδα 114 - If from a point without a circle, a tangent and a secant be drawn, the tangent will be a mean proportional between the secant and its external segment.
Σελίδα 57 - If two triangles have two angles and the included side of the one, equal to two angles and the included side of the other, each to each, the two triangles will be equal.
Σελίδα 57 - Parallelograms upon the same base and between the same parallels, are equal to one another.
Σελίδα 69 - The sum of the squares on the sides of a parallelogram is equal to the sum of the squares on the diagonals.