Euclid, books i. & ii., with notes, examples, and explanations, by a late fellow and senior mathematical lecturer1879 |
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Σελίδα 61
... difference of BD , CE . 4. Through a given point draw a line so that the part of it intercepted between two given parallel lines may be equal to a given straight line . Show that there may be two , one , or no solutions . 5. Through two ...
... difference of BD , CE . 4. Through a given point draw a line so that the part of it intercepted between two given parallel lines may be equal to a given straight line . Show that there may be two , one , or no solutions . 5. Through two ...
Σελίδα 64
... difference of the angles at the base of any triangle is double the angle contained by two lines drawn from the vertex , one bisecting the vertical angle , the other perpendicular to the base . 3. Straight lines bisecting two adjacent ...
... difference of the angles at the base of any triangle is double the angle contained by two lines drawn from the vertex , one bisecting the vertical angle , the other perpendicular to the base . 3. Straight lines bisecting two adjacent ...
Σελίδα 87
... difference of two given sqs . ] 1. Four times the square on the perpendicular from an angle of an equilateral triangle on the opposite side is three times the square on one of the sides . 2. If A be the vertex of an isosceles triangle ...
... difference of two given sqs . ] 1. Four times the square on the perpendicular from an angle of an equilateral triangle on the opposite side is three times the square on one of the sides . 2. If A be the vertex of an isosceles triangle ...
Σελίδα 88
... difference of the squares on the segments into which it is divided is equal to the square on the other side . 5. AB is the common hypotenuse of two right - angled triangles , ACB , ADB , and AE , BF are perpendicular to CD ( produced ...
... difference of the squares on the segments into which it is divided is equal to the square on the other side . 5. AB is the common hypotenuse of two right - angled triangles , ACB , ADB , and AE , BF are perpendicular to CD ( produced ...
Σελίδα 101
... difference of the squares on two unequal lines is equal to the rectangle contained by their sum and their difference . [ The corollary follows thus : -Let AC , CD be two lines of which AC is the greater ; produce AC to B , making CB AC ...
... difference of the squares on two unequal lines is equal to the rectangle contained by their sum and their difference . [ The corollary follows thus : -Let AC , CD be two lines of which AC is the greater ; produce AC to B , making CB AC ...
Άλλες εκδόσεις - Προβολή όλων
Euclid, Books I. & II., with Notes, Examples, and Explanations, by a Late ... Euclides Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD algebraical angle contained angle equal base BC beginner centre coincide compl Constr contains a units demonstration describe sq diagonal diameter double of sq double sq draw equal angles equal sides equilat equilateral triangle Euclid exterior angle four rt geometrical given line given point given rectilineal given st given straight line gnomon CMG greater half a rt hypotenuse isosceles triangle join less Let AB contain Let ABC line drawn meet opposite angles opposite sides parallel parallelogram PROBLEM produced prop proved quadrilateral rectangle contained rectil right angles right-angled triangle sides equal square THEOREM triangle ABC twice rect unequal vertex
Δημοφιλή αποσπάσματα
Σελίδα 48 - 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.
Σελίδα 32 - If, at a point in a straight line, two other straight lines, upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two straight lines shall be in one and the same straight line.
Σελίδα 2 - A circle is a plane figure contained by one line, which is called the circumference, and is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another : 16. And this point is called the centre of the circle. 17. A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Σελίδα 109 - If a straight line be bisected, and produced to any point; the rectangle contained by the whole line thus produced, and the part of it produced, together with the square of half the line bisected, is equal to the square of the straight line, which is made up of the half and the part produced.
Σελίδα 1 - ... angles is called a right angle; and the straight line which stands on the other is called a perpendicular to it. 11. An obtuse angle is that which is greater than a right angle. 12. An acute angle is that which \ is less than a right angle. 13. A term or boundary is the extremity of any thing.
Σελίδα 6 - Notions 1. Things which are equal to the same thing are also equal to one another. 2. If equals be added to equals, the wholes are equal. 3. If equals be subtracted from equals, the remainders are equal. 4. Things which coincide with one another are equal to one another.
Σελίδα 77 - To describe a parallelogram that shall be equal to a given triangle, and have one of its angles equal to a given rectilineal angle.
Σελίδα 3 - An equilateral triangle is that which has three equal sides : 25. An isosceles triangle is that which has two sides equal : 26. A scalene triangle is that which has three unequal sides : 27.
Σελίδα 1 - 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.
Σελίδα 84 - In any right-angled triangle, the square which is described upon the side subtending the right angle, is equal to the squares described upon the sides which contain the right angle.