Elementary Plane Geometry: Inductive and DeductiveGinn, 1903 - 144 páginas |
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Página 3
... equal , and likewise those opposite to the angles of 62 ° , and that the remaining angles of the triangles have the same magnitude . Analogous constructions and measure- ments being repeated in a number of cases , the learner , as a ...
... equal , and likewise those opposite to the angles of 62 ° , and that the remaining angles of the triangles have the same magnitude . Analogous constructions and measure- ments being repeated in a number of cases , the learner , as a ...
Página 4
... equal which are ridiculously unlike , and lines are proved to be equal which the eye tells us differ in length by several inches . In fact , in spite of accuracy of thought , the utmost contempt for physical accuracy is often inculcated ...
... equal which are ridiculously unlike , and lines are proved to be equal which the eye tells us differ in length by several inches . In fact , in spite of accuracy of thought , the utmost contempt for physical accuracy is often inculcated ...
Página 7
... equal to , or less than another . For the more rapid and more accurate construction of figures , the following instruments are also desirable : 4. A pair of dividers , both the legs of which terminate in fine points . These more ...
... equal to , or less than another . For the more rapid and more accurate construction of figures , the following instruments are also desirable : 4. A pair of dividers , both the legs of which terminate in fine points . These more ...
Página 8
... equal to another . 7. Parallel rulers . While for drawing lines parallel to each other nothing more is essential than a ruler along which the set- square is made to slide , or a ruler and an instrument for measuring angles , or a ruler ...
... equal to another . 7. Parallel rulers . While for drawing lines parallel to each other nothing more is essential than a ruler along which the set- square is made to slide , or a ruler and an instrument for measuring angles , or a ruler ...
Página 10
... equal , then each of them is called a right angle , and the lines DB and ABC are said to be perpendicular to each other . + A Evidently at the point B there are four right angles . An angle which is less than a right angle , as BAC , is ...
... equal , then each of them is called a right angle , and the lines DB and ABC are said to be perpendicular to each other . + A Evidently at the point B there are four right angles . An angle which is less than a right angle , as BAC , is ...
Otras ediciones - Ver todas
Elementary Plane Geometry: Inductive and Deductive / By Alfred Baker Alfred Baker Sin vista previa disponible - 2015 |
Términos y frases comunes
50 millimetres ABCD adjusting the bevel angle ABC angle ACB angle BAC angle of 60 angles equal angular points Apply test centre chord circle of radius circle touching circumference construct a rectangle Construct a triangle Construct the triangle containing an angle Describe a circle Describe a regular Describe two circles diagonals distance dividers draw a line draw tangents drawn equal angles equilateral triangle exterior angle figure Give proof Give reasons Hence hypotenuse inches inscribe isosceles triangle measure middle point occupy with respect opposite angles opposite sides parallel lines parallel rulers parallel to BC parallelogram perpendicular position preceding question previous question protractor quadrilateral radii radius 40 millimetres rectangle equal regular hexagon regular pentagon remaining angles rhombus right angles right-angled triangle segment set-square side of BC similar triangles square straight line struct Test accuracy Test the accuracy three angles triangle ABC triangle with sides triangles are equal
Pasajes populares
Página 68 - In any right-angled triangle, the square which is described on the side subtending the right angle is equal to the sum of the squares described on the sides which contain the right angle.
Página 95 - When it is affirmed (for instance) that " if two straight lines in a circle intersect each other, the rectangle contained by the segments of the one is equal to the rectangle contained by the segments of the other...
Página 42 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Página 40 - Thus when it is said that the sum of the three angles of any triangle is equal to two right angles, this is a theorem, the truth of which is demonstrated by Geometry.
Página 91 - If a straight line touch a circle, and from the point of contact a chord be drawn, the angles which this chord makes with the tangent are equal to the angles in the alternate segments.
Página 17 - Euclid's, and show by construction that its truth was known to us ; to demonstrate, for example, that the angles at the base of an isosceles triangle are equal...
Página 18 - If two angles of a triangle are equal, the sides opposite to these angles are equal 21 ^THEOREM 14.
Página 86 - The angle at the centre of a circle is double the angle at the circumference on the same arc.
Página 88 - The opposite angles of a quadrilateral inscribed in a circle are together equal to two right angles, with converse.
Página 96 - BC, contained by the whole of the cutting line, and the part of it without the circle, is equal to the square of BD which meets it ; therefore the straight line BD touches the circle ACD : (in.