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Euclid for beginners, books i. and ii., with simple exercises by F.B. Harvey
Euclid,F. B. Harvey
Uten tilgangsbegrensning - 1880
ABCD AC and BD alternate angle angle ABC angle ACB angle AGH angle BAC angle EDF Arithmetic base BC Beginners bisected Book centre circle coincides cons Construction crown 8vo describe Dictionary divided double the square draw drawn Edition Elementary English Grammar equal Euclid exterior angle falls figure former four French Geography German given straight line gnomon greater Greek half History join Latin latter less Let ABC London LONGMANS Manual Maps meet opposite angle parallel parallelogram Plane post 8vo PROBLEM produced proof PROOF.—Because PROP Proposition proved Reading rectangle contained rectilineal right angles School Second side AB side AC Similarly small 8vo square on AC Standard straight line supposition THEOREM third triangle ABC unequal vols Wherefore whole
Side 48 - IF a side of any triangle be produced, the exterior angle is equal to the two interior and opposite angles ; and the three interior angles of every triangle are equal to two right angles.
Side 14 - To draw a straight line at right angles to a given straight line, from a given point in the same.
Side 36 - If two triangles have two angles of the one equal to two angles of the other, each to each, and also one side of the one equal to the corresponding side of the other, the triangles are congruent.
Side 64 - 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.
Side 108 - In every triangle, the square on the side subtending an acute angle, is less than the squares on 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 on it from the opposite angle, and the acute angle. Let ABC be any triangle, and the angle at B an acute angle; and on BC one of the sides containing it, let fall the perpendicular...
Side 47 - To draw a straight line through a given point parallel to a given straight line. Let A be the given point, and BC the given straight line.
Side 104 - To divide a given straight line into two parts, so that the rectangle contained by the whole, and one of the parts, may be equal to the square of the other part.
Side 52 - The straight lines which join the extremities of two equal and parallel straight lines, towards the same parts, are also themselves equal and parallel.