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A Text-Book of Euclid's Elements For: The Use of Schools, Books I-Vi and XI ...
H. S. Hall
Sin vista previa disponible - 2017
ABCD alternate base bisected bisectors Book called centre chord circumference circumscribed common Constr Construction DEFINITION describe Describe a circle diagonal diameter difference divided draw drawn equal equilateral Euclid's EXERCISES external extremities figure fixed formed four given circle given point given straight line greater half Hence inches inscribed intersect Join length less Let ABC magnitude meet middle point NOTE opposite sides par¹ parallel parallelogram pass perp perpendicular plane PROBLEM produced Proof proportional PROPOSITION prove quadrilateral radius ratio rect rectangle contained regular remaining respectively right angles segment shew shewn sides similar Similarly square straight line drawn tangent THEOREM third touch triangle ABC twice vertex vertical angle whole
Página 355 - Pythagoras' theorem states that the square of the length of the hypotenuse of a right-angled triangle is equal to the sum of the squares of the lengths of the other two sides.
Página 67 - 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 164 - AB into two parts, so that the rectangle contained by the whole line and one of the parts, shall be equal to the square on the other part.
Página 327 - From this it is manifest that prisms upon triangular bases, of the same altitude, are to one another as their bases. Let the...
Página 164 - If a straight line be bisected and produced to any point, the rectangle contained by the whole line thus produced and the part of it produced, together •with the square...
Página 293 - The side of a regular hexagon inscribed in a circle is equal to the radius of the circle.
Página 81 - The straight line joining the middle points of two sides of a triangle is parallel to the third side and equal to half of it 46 INTERCEPTS BY PARALLEL LINES.
Página 20 - THE angles at the base of an isosceles triangle are equal to one another : and, if the equal sides be produced, the angles upon the other side of the base shall be equal.