## Euclid's Elements of Geometry: Chiefly from the Text of Dr. Simson, with Explanatory Notes; a Series of Questions on Each Book; and a Selection of Geometrical Exercises from the Senate-house and College Examination Papers, with Hints, &c. Designed for the Use of the Junior Classes in Public and Private Schools. the first six books, and the portions of the eleventh and twelfth books read at CambridgeLongman, Green, Longman, Roberts, and Green, 1868 - 410 páginas |

### Dentro del libro

Resultados 1-5 de 70

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**vertex**of the angle , that is , at the point in which the straight lines that contain the angle meet one another , is put between the other two letters , and one of these two is somewhere upon one of these straight lines , and the other ... Página 11

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**vertex**of each of the triangles is without the other triangle . Because AC is equal to AD in the triangle ACD , therefore the angle ADC is equal to the angle ACD ; ( 1. 5. ) but the angle ACD is greater than the angle BCD ; ( ax . 9 ... Página 30

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**vertex**of all the triangles , are equal to four right angles , ( 1. 15. Cor . 2. ) therefore the same angles of these triangles are equal to the angles of the figure together with four right angles ; but it has been proved that the ... Página 44

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**vertex**of the angle , and must not be confounded with the magnitude of the angle itself . The right angle is fixed in mag- nitude , and , on this account , it is made the standard with which all other angles are compared . Two straight ... Página 52

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**vertices**A , D may be on opposite sides of EF . Join AD . Then because EAD is an isosceles triangle , the angle EAD is equal to the angle EDA ; and because CDA is an isosceles triangle , the angle CAD is equal to the angle CDA . Hence ...### Términos y frases comunes

A₁ ABCD AC is equal Algebraically angle ABC angle ACB angle BAC Apply Euc base BC chord circle ABC constr demonstrated describe a circle diagonals diameter divided double draw equal angles equiangular equilateral triangle equimultiples Euclid exterior angle Geometrical given circle given line given point given straight line gnomon greater hypotenuse inscribed intersection isosceles triangle less Let ABC line BC lines be drawn multiple opposite angles parallelogram parallelopiped pentagon perpendicular plane polygon problem produced Prop proportionals proved Q.E.D. PROPOSITION quadrilateral figure radius ratio rectangle contained rectilineal figure remaining angle right angles right-angled triangle segment semicircle shew shewn similar similar triangles solid angle square on AC tangent THEOREM touch the circle trapezium triangle ABC twice the rectangle vertex vertical angle wherefore

### Pasajes populares

Página 6 - If a straight line meets two straight lines, so as to make the two interior angles on the same side of it taken together less than two right angles...

Página 118 - Guido, with a burnt stick in his hand, demonstrating on the smooth paving-stones of the path, that the square on the hypotenuse of a right-angled triangle is equal to the sum of the squares on the other two sides.

Página 2 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it.

Página 317 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz.

Página 90 - If a straight line be divided into any two parts, the squares of the whole line, and of one of the parts, are equal to twice the rectangle contained by the whole and that part, together with the square of the other part. Let the straight line AB be divided into any two parts in the point C; the squares of AB, BC are equal to twice the rectangle AB, BC, together with the square of AC.

Página 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 of the line between the points of section, is equal to the square of half the line.

Página 30 - ... twice as many right angles as the figure has sides ; therefore all the angles of the figure together with four right angles, are equal to twice as many right angles as the figure has sides.

Página 9 - 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.

Página 22 - IF two triangles have two sides of the one equal to two sides of the other, each to each, but the angle contained by the two sides of one of them greater than the angle contained by the two sides equal to them, of the other ; the base of that which has the greater angle shall be greater than the base of the other...

Página 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...