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12mo St 8vo St ABC and ABD ABC is greater AC and BD adjacent angles alternate angle angle ABC angle ACB angle AGH angle BAC angle CEB angle DEF angle EDF angle GHD Arithmetic BA and AC base BC Beginners bisected Book centre Construction.—1 crown 8vo 7t double the square draw English Grammar equilateral triangle Euclid exterior angle Geography given straight line gnomon History i.e. the angle interior and opposite isosceles triangle join Key 2t Latin Let ABC line be divided Maps note 2 def opposite angle parallelogram post 8vo produced Proof.—Because Proposition proved Q. E. D. Exercises Q. E. D. Prop rectangle contained rectilineal figure right angles side AB side AC small 8vo square on AC straight line CD Theorem there/ore triangle ABC twice the rect twice the rectangle vols Wherefore
Página 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.
Página 14 - To draw a straight line at right angles to a given straight line, from a given point in the same.
Página 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.
Página 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.
Página 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...
Página 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.
Página 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.
Página 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.