Geometrical Problems Deducible from the First Six Books of Euclid, Arranged and Solved: To which is Added an Appendix Containing the Elements of Plane Trigonometry ...J. Smith, 1819 - 377 σελίδες |
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Σελίδα
... parallelograms , squares and polygons . The 5th section contains those which require lines to be drawn in certain directions , but which involve properties of rectangles or squares , or such others as were excluded from the three first ...
... parallelograms , squares and polygons . The 5th section contains those which require lines to be drawn in certain directions , but which involve properties of rectangles or squares , or such others as were excluded from the three first ...
Σελίδα xxii
... parallelogram . 3. To bisect a parallelogram by a line drawn from a point in one of its sides . 4. If from any point in the diameter ( or diameter produced ) of a parallelogram straight lines be drawn to the opposite angles ; they will ...
... parallelogram . 3. To bisect a parallelogram by a line drawn from a point in one of its sides . 4. If from any point in the diameter ( or diameter produced ) of a parallelogram straight lines be drawn to the opposite angles ; they will ...
Σελίδα xxiii
... parallelogram ( in the last problem ) ; and its ratio to the trapezium . 16. If two sides of a trapezium be parallel ; its area is equal to half that of a parallelogram whose base is the sum of those two sides , and altitude the ...
... parallelogram ( in the last problem ) ; and its ratio to the trapezium . 16. If two sides of a trapezium be parallel ; its area is equal to half that of a parallelogram whose base is the sum of those two sides , and altitude the ...
Σελίδα xxiv
... parallelograms described on the two sides of a triangle is equal to that of a parallelogram on the base , whose side is equal and parallel to the line drawn from the vertex of the triangle to the intersection of the two sides of the ...
... parallelograms described on the two sides of a triangle is equal to that of a parallelogram on the base , whose side is equal and parallel to the line drawn from the vertex of the triangle to the intersection of the two sides of the ...
Σελίδα xxv
... parallelogram lines be drawn to the angular points ; the sums of the squares of those which are drawn to the opposite angles are equal . 34. The squares of the diagonals of a parallelogram are together equal to the squares of the four ...
... parallelogram lines be drawn to the angular points ; the sums of the squares of those which are drawn to the opposite angles are equal . 34. The squares of the diagonals of a parallelogram are together equal to the squares of the four ...
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Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD angle ABC base bisects the angle centre chord circle ABC circles cut circles touch circumference describe a circle divided draw any line drawn parallel duplicate ratio equal angles equiangular Eucl extremities given angle given circle given in position given line given point given ratio given straight line given triangle inscribed intercepted isosceles triangle Join AE Join BD Let AB Let ABC let fall line given line joining line required lines be drawn lines drawn mean proportional opposite side parallel to BC parallelogram pendicular perpendicular be drawn point of bisection point of contact point of intersection quadrant radius rectangle contained right angles right-angled triangle segments semicircle shewn tangent touches the circle trapezium triangle ABC vertex vertical angle
Δημοφιλή αποσπάσματα
Σελίδα 124 - If a straight line be drawn parallel to one of the sides of a triangle, it shall cut the other sides, or those sides produced, proportionally; and if the sides, or the sides produced, be cut proportionally, the straight '.line which joint the points of section, shall be parallel to the remaining side of the triangle.
Σελίδα xiii - IF from any point without a circle two straight lines be drawn, one of which cuts the circle, and the other touches it ; the rectangle contained by the whole line which cuts the circle, and the part of it without the circle,. shall be equal to the square of the line which touches it.
Σελίδα 158 - Iff a straight line be divided into any two parts, four times the rectangle contained by the whole line, and one of the parts, together with the square of the other...
Σελίδα 160 - Upon a given straight line, to describe a segment of a circle, containing an angle equal to a given angle. Let AB be the given straight line, and C the given angle ; it is required to.
Σελίδα 230 - To describe an isosceles triangle, having each of the angles at the base double of the third angle.
Σελίδα 157 - AB be the given straight line ; it is required to divide it into two parts, so that the rectangle contained by the whole, and one of the parts, shall be equal to the square of the other part.
Σελίδα 33 - FC ; (ax. 1.) and FA, FB, FC are equal to one another : wherefore the circle described from the centre F, at the distance of one of them, will pass through the extremities of the other two, and be described about the triangle ABC.
Σελίδα xxv - ... the squares of the diagonals, is equal to the sum of the squares of the bisected sides together with four times the square of the line joining those points of bisection.
Σελίδα 248 - If an equilateral triangle be inscribed in a circle, and the adjacent arcs cut off by two of its sides be bisected, the line joining the points of bisection shall be trisected by the sides.
Σελίδα 355 - The sine of an angle is equal to the sine of its supplement. The sine rule Consider fig.