Elementary Plane Geometry: Inductive and DeductiveGinn, 1903 - 144 Seiten |
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Seite 7
... protractor . This is used for constructing angles of any given num- ber of degrees ; and for measuring the number of degrees in any given angle . It may also be used for determining whether one angle is greater than , equal to , or less ...
... protractor . This is used for constructing angles of any given num- ber of degrees ; and for measuring the number of degrees in any given angle . It may also be used for determining whether one angle is greater than , equal to , or less ...
Seite 12
... protractor at the point A in the line AB an angle of any required magnitude , say 63 ° Place the centre of the protractor at A , and let the line X B joining the centre with the point on the circumference which indicates 0 ° , rest ...
... protractor at the point A in the line AB an angle of any required magnitude , say 63 ° Place the centre of the protractor at A , and let the line X B joining the centre with the point on the circumference which indicates 0 ° , rest ...
Seite 13
... protractor , measure their magnitude to the nearest degree . 7. Draw five straight lines of different lengths , and with the eye endeavor to judge their lengths ( 1 ) in inches and fractions of an inch , ( 2 ) in millimetres ...
... protractor , measure their magnitude to the nearest degree . 7. Draw five straight lines of different lengths , and with the eye endeavor to judge their lengths ( 1 ) in inches and fractions of an inch , ( 2 ) in millimetres ...
Seite 14
... protractor convert this paper into a protractor , so as to mark angles at intervals of 10 ° , the markings being on the irregular edge of the paper . Construction of Triangles . 1. Take a line AB of 14 GEOMETRY .
... protractor convert this paper into a protractor , so as to mark angles at intervals of 10 ° , the markings being on the irregular edge of the paper . Construction of Triangles . 1. Take a line AB of 14 GEOMETRY .
Seite 16
... protractor to verify this . 2. Take a line AB of , say , 25 millimetres in length , and with centres A and B describe portions of circles intersecting as indicated . at C , each circle having the same radius , say 35 millimetres . Draw ...
... protractor to verify this . 2. Take a line AB of , say , 25 millimetres in length , and with centres A and B describe portions of circles intersecting as indicated . at C , each circle having the same radius , say 35 millimetres . Draw ...
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Elementary Plane Geometry: Inductive and Deductive / By Alfred Baker Alfred Baker Keine Leseprobe verfügbar - 2015 |
Häufige Begriffe und Wortgruppen
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
Beliebte Passagen
Seite 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.
Seite 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...
Seite 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.
Seite 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.
Seite 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.
Seite 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...
Seite 18 - If two angles of a triangle are equal, the sides opposite to these angles are equal 21 ^THEOREM 14.
Seite 86 - The angle at the centre of a circle is double the angle at the circumference on the same arc.
Seite 88 - The opposite angles of a quadrilateral inscribed in a circle are together equal to two right angles, with converse.
Seite 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.