Geometry for schools, comprising books i. and ii. of Euclid, with some additions and numerous exercises, by A.J.G. BarclayOliver & Boyd, 1883 - 96 páginas |
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Página 8
... vertex of the angle ; and the lines , which may be of any length , are its arms . When there is only one angle at a point it is named by a single letter placed at the vertex , as N. In other cases three letters name an angle , the ...
... vertex of the angle ; and the lines , which may be of any length , are its arms . When there is only one angle at a point it is named by a single letter placed at the vertex , as N. In other cases three letters name an angle , the ...
Página 16
... vertices bisects the vertical angles , bisects the common base , and is at right angles to the base . 8. The same is true if the isosceles triangles are on the same side of the base . ( See note , Eu . I. 7 , Appendix . ) 9. If any ...
... vertices bisects the vertical angles , bisects the common base , and is at right angles to the base . 8. The same is true if the isosceles triangles are on the same side of the base . ( See note , Eu . I. 7 , Appendix . ) 9. If any ...
Página 17
... vertex of a triangle to the middle point of the base is also at right angles to the base , the triangle is isosceles . 13. If two straight lines bisect one another at right angles , any point in either is equidistant from the ...
... vertex of a triangle to the middle point of the base is also at right angles to the base , the triangle is isosceles . 13. If two straight lines bisect one another at right angles , any point in either is equidistant from the ...
Página 18
... beyond F. 16. The straight line joining the vertex of an isosceles triangle to the middle point of the base is at right angles to the base , and bisects the vertical angle . PROP . 9. PROB . To bisect a given angle 18 GEOMETRY .
... beyond F. 16. The straight line joining the vertex of an isosceles triangle to the middle point of the base is at right angles to the base , and bisects the vertical angle . PROP . 9. PROB . To bisect a given angle 18 GEOMETRY .
Página 25
... vertex on the base must fall within the triangle . 38. If one of the angles at the base of a triangle is an obtuse angle , the perpendicular from the vertex on the base must fall without the triangle , towards the side on which is the ...
... vertex on the base must fall within the triangle . 38. If one of the angles at the base of a triangle is an obtuse angle , the perpendicular from the vertex on the base must fall without the triangle , towards the side on which is the ...
Otras ediciones - Ver todas
Geometry For Schools, Comprising Books I. And Ii. Of Euclid, With Some ... Euclides Sin vista previa disponible - 2019 |
Geometry For Schools, Comprising Books I. And Ii. Of Euclid, With Some ... Euclides Sin vista previa disponible - 2019 |
Términos y frases comunes
AC² angle contained angles equal angular points Atlas base BC BC² bisect Boyd's School Carefully Revised centre Coloured Maps cons construct a triangle diagonals Dr Douglas's Dr Reid's Edinburgh Academy Euclid Exercises exterior angle figure has sides find a point four right angles full-coloured Maps George Watson's College given line given point given straight line given triangle hypotenuse interior isosceles triangle late Head Master Lawson's LL.D middle points Modern Geography Oliver and Boyd's opposite angles opposite sides Outline of Sacred parallelogram perpendicular Physical Geography point in CD polygon produced PROP proposition prove quadrilateral Questions for Examination rect rectangle contained reflex angle regular polygon Reid's Elements rhombus right-angled triangle Rudiments of Modern Sacred Geography showing Recent sides equal square St Mark's College Text-Book THEOR trapezium triangles ABC vertex WILLIAM LAWSON
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Página 46 - 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.
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