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Euclid's Elements of Geometry: Chiefly from the Text of Dr. Simson, with ...
Robert Potts,Thomas Kirkland
Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016
ABCD Algebraically Apply base bisected Book chord circle circumference common construction definition demonstrated described diagonals diameter difference distance divided double draw equal equal angles equiangular equilateral triangle equimultiples Euclid exterior angle extremities fall figure formed four fourth Geometrical given circle given line given point given straight line greater half Hence inscribed interior intersection join less Let ABC line drawn magnitudes manner mean meet multiple opposite sides parallel parallelogram pass perpendicular plane problem produced Prop proportionals PROPOSITION proved quadrilateral radius ratio reason rectangle contained rectilineal figure regular remaining respectively right angles segment semicircle shew shewn sides similar solid square taken tangent THEOREM third touch triangle ABC twice units vertex wherefore whole
Σελίδα 93 - If a straight line be bisected and produced to any point, the square on the whole line thus produced, and the square on the part of it produced, are together double of the square on half the line bisected, and of the square on the line made up of the half and the part produced. Let the straight line AB be bisected in C, and produced to D ; The squares on AD and DB shall be together double of the squares on AC and CD. CONSTRUCTION. — From the point C draw CE at right angles to AB, and make it equal...
Σελίδα 145 - If a straight line touch a circle, and from the point of contact a straight line be drawn cutting the circle ; the angles which this line makes with the line touching the circle, shall be equal to the angles which are in the alternate segments of the circle.
Σελίδα 88 - If a straight line be divided into two equal parts and also into two unequal parts, the rectangle contained by the unequal parts, together with the square on the line between the points of section, is equal to the square on half the line.
Σελίδα 26 - ... upon the same side together equal to two right angles, the two straight lines shall be parallel to one another.
Σελίδα 36 - To a given straight line to apply a parallelogram, which shall be equal to a given triangle, and have one of its angles equal to a given rectilineal angle.
Σελίδα 144 - 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.
Σελίδα 92 - If a straight line be divided into two equal, and also into two unequal parts, the squares on the two unequal parts are together double of the square on half the line and of the square on the line between the points of section. Let the straight line AB be divided into two equal parts...
Σελίδα xv - In every triangle, the square of the side subtending either of the acute angles is less than the squares of the sides containing that angle, by twice the rectangle contained by either of these sides, and the straight line intercepted between the perpendicular let fall upon it from the opposite angle, and the acute angle.