Elementary Geometry: Practical and TheoreticalUniversity Press, 1903 - 355 Seiten |
Im Buch
Ergebnisse 1-5 von 84
Seite 9
... angles made by the creases , as in fig . 16 ; they are all equal for when folded they fitted on one another . Such angles are called right angles . An angle less than a right angle is called an acute angle . An angle greater than a right ...
... angles made by the creases , as in fig . 16 ; they are all equal for when folded they fitted on one another . Such angles are called right angles . An angle less than a right angle is called an acute angle . An angle greater than a right ...
Seite 10
... right angle would be obtained ? If a right angle is divided into 90 equal angles , each of these angles is called a degree . 25 ° is the abbreviation for " 25 degrees . " · 180 170 160 150 140 d 10 20 30 40 130 50 120 60 110 70 08880 ...
... right angle would be obtained ? If a right angle is divided into 90 equal angles , each of these angles is called a degree . 25 ° is the abbreviation for " 25 degrees . " · 180 170 160 150 140 d 10 20 30 40 130 50 120 60 110 70 08880 ...
Seite 11
... angle , place the protractor so that its centre C is at the vertex of the angle and its base , CX , along one arm of the ... right set of numbers ; e.g. if the one arm of the angle to be measured lies ... angle in a figure that you ANGLES 11.
... angle , place the protractor so that its centre C is at the vertex of the angle and its base , CX , along one arm of the ... right set of numbers ; e.g. if the one arm of the angle to be measured lies ... angle in a figure that you ANGLES 11.
Seite 12
... angle to a given measure ) , always indicate in your figure the number of degrees , as in fig . 19 . Ex . 36. Cut out of paper a right angle , bisect it by folding , and measure the two angles thus formed . 57 O fig . 19 . Ex . 37 ...
... angle to a given measure ) , always indicate in your figure the number of degrees , as in fig . 19 . Ex . 36. Cut out of paper a right angle , bisect it by folding , and measure the two angles thus formed . 57 O fig . 19 . Ex . 37 ...
Seite 14
... angle by means of the pro- tractor . ) Ex . 45. Make angles of 20 ° , 35 ° , 64 ° , 130 ° , 157 ° , 176 ° ( let them point in different directions ) . State whether each one is acute , right , or obtuse . Ex . 46. Make the following angles ...
... angle by means of the pro- tractor . ) Ex . 45. Make angles of 20 ° , 35 ° , 64 ° , 130 ° , 157 ° , 176 ° ( let them point in different directions ) . State whether each one is acute , right , or obtuse . Ex . 46. Make the following angles ...
Andere Ausgaben - Alle anzeigen
Elementary Geometry: Practical and Theoretical Charles Godfrey,Arthur Warry Siddons Keine Leseprobe verfügbar - 2015 |
Elementary Geometry: Practical and Theoretical C. Godfrey,A. W. Siddons Keine Leseprobe verfügbar - 2020 |
Häufige Begriffe und Wortgruppen
AABC altitude base BC bisects Calculate centimetres centre chord circle of radius circumcentre circumcircle circumference circumscribed common tangent concyclic Constr Construct a triangle Construction Proof cyclic quadrilateral Data diagonal diameter distance divided Draw a circle Draw a straight equal circles equiangular equidistant equilateral triangle equivalent find a point Find the area fixed point Give a proof given circle given line given point given straight line hypotenuse inch paper inscribed intersect isosceles trapezium isosceles triangle LAOB LAPB locus of points Measure mid-point miles opposite sides parallelogram Plot the locus polygon produced protractor Q. E. D. Ex quadrilateral ABCD radii rect rectangle rectangle contained reflex angle Repeat Ex rhombus right angles right-angled triangle segment set square similar triangles subtends tangent THEOREM trapezium triangle ABC units of length vertex vertical angle
Beliebte Passagen
Seite 88 - 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.
Seite 269 - To describe an isosceles triangle, having each of the angles at the base double of the third angle.
Seite 206 - If a straight line be divided into any two parts, four times the rectangle contained by the whole line, and one of the parts, together with the square of the other part, is equal to the square of the straight line which is made up of the whole and that part.
Seite 342 - 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.
Seite 270 - 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 186 - This sub-division shows that the square on the hypotenuse of the above right-angled triangle is equal to the sum of the squares on the sides containing the right angle.
Seite 206 - 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 on the line between the points of section, is equal to the square on half the line.
Seite 136 - To draw a straight line through a given point parallel to a given straight line. Let A be the given point, and BC the given straight line.
Seite 214 - A point moves so that the sum of the squares of its distances from the points (0, 0), (1, 0) is constant.
Seite 123 - The difference between any two sides of a triangle is less than the third side.