The Elements of Euclid, books i. to vi., with deductions, appendices and historical notes, by J.S. Mackay. [With] Key1884 |
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Αποτελέσματα 1 - 5 από τα 46.
Σελίδα 27
... middle points of AB , BC , CD , DA , and EF , FG , GH , HE are joined . Prove that EFGH has all its sides equal . 12. Prove by superposition that the squares described on two equal straight lines are equal . 13. If two quadrilaterals ...
... middle points of AB , BC , CD , DA , and EF , FG , GH , HE are joined . Prove that EFGH has all its sides equal . 12. Prove by superposition that the squares described on two equal straight lines are equal . 13. If two quadrilaterals ...
Σελίδα 29
... points D , E are taken equally distant from A ; prove that the triangles ABE , ACD are equal in all respects , and also the triangles DBC , ECB . 6. Prove that the opposite angles of a rhombus are equal . 7. D and E are the middle points ...
... points D , E are taken equally distant from A ; prove that the triangles ABE , ACD are equal in all respects , and also the triangles DBC , ECB . 6. Prove that the opposite angles of a rhombus are equal . 7. D and E are the middle points ...
Σελίδα 32
... middle point of the base , is perpendicular to the base , and bisects the vertical angle . 2. The opposite angles of a rhombus are equal . 3. Either diagonal of a rhombus bisects the angles through which it passes . 4. ABCD is a ...
... middle point of the base , is perpendicular to the base , and bisects the vertical angle . 2. The opposite angles of a rhombus are equal . 3. Either diagonal of a rhombus bisects the angles through which it passes . 4. ABCD is a ...
Σελίδα 51
... point except the intersection of the diagonals . 13. The sum of any two sides of a triangle is greater than twice the median ... middle point of the opposite side . A E B Produce BD to meet AC at E. Book I. ] 51 PROPOSITIONS 20 , 21 .
... point except the intersection of the diagonals . 13. The sum of any two sides of a triangle is greater than twice the median ... middle point of the opposite side . A E B Produce BD to meet AC at E. Book I. ] 51 PROPOSITIONS 20 , 21 .
Σελίδα 58
... middle 5. ABC is a triangle , having AB less than AC . point of BC , and AD is joined ; prove that 6. ABC is an isosceles triangle , having AB : = ADB is acute . AC . Dis any point such that BD is greater than DC ; prove that AD does ...
... middle 5. ABC is a triangle , having AB less than AC . point of BC , and AD is joined ; prove that 6. ABC is an isosceles triangle , having AB : = ADB is acute . AC . Dis any point such that BD is greater than DC ; prove that AD does ...
Άλλες εκδόσεις - Προβολή όλων
The Elements of Euclid, books i. to vi., with deductions, appendices and ... Euclides Πλήρης προβολή - 1885 |
The Elements of Euclid, Books I. to VI., with Deductions, Appendices and ... John Sturgeon Mackay,John Sturgeon Euclides Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2018 |
The Elements of Euclid, Books I. to VI., with Deductions, Appendices and ... John Sturgeon MacKay,John Sturgeon Euclides Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2015 |
Συχνά εμφανιζόμενοι όροι και φράσεις
AB² ABCD AC² AD² angles equal base BC bisected bisector CD² centre chord circumscribed Const deduction diagonals diameter divided in medial divided internally draw equiangular equilateral triangle equimultiples Euclid's exterior angles Find the locus given circle given point given straight line greater Hence hypotenuse inscribed intersection isosceles triangle less Let ABC lines is equal magnitudes medial section median meet middle points opposite sides orthocentre parallel parallelogram perpendicular polygon produced PROPOSITION 13 Prove the proposition quadrilateral radical axis radii radius ratio rectangle contained rectilineal figure regular pentagon required to prove rhombus right angle right-angled triangle square on half straight line drawn straight line joining tangent THEOREM unequal segments vertex vertical angle Нур
Δημοφιλή αποσπάσματα
Σελίδα 147 - 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.
Σελίδα 276 - IF there be any number of magnitudes, and as many others, which, taken two and two, in a cross order, have the same ratio; the first shall have to the last of the first magnitudes the same ratio which the first of the others has to the last. NB This is usually cited by the words
Σελίδα 331 - If the vertical angle of a triangle be bisected by a straight line which also cuts the base, the segments of the base shall have the same ratio which the other sides of the triangle have to one another...
Σελίδα 17 - From the greater of two given straight lines to cut off a part equal to the less. Let AB and C be the two given straight lines, whereof AB is the greater.
Σελίδα 112 - If a straight line be divided into any two parts, the rectangle contained by the whole and one of the parts, is equal to the rectangle contained by the two parts, together with the square of the aforesaid part.
Σελίδα 87 - Guido, with a burnt stick in his hand, demonstrating on the smooth paving-stones of the path, that the square on the hypotenuse of a right-angled triangle is equal to the sum of the squares on the other two sides.
Σελίδα 254 - If there be four magnitudes, and if any equimultiples whatsoever be taken of the first and third, and any equimultiples whatsoever of the second and fourth, and if, according as the multiple of the first is greater than the multiple of the second, equal to it or less, the multiple of the third is also greater than the multiple of the fourth, equal to it or less ; then, the first of the magnitudes is said to have to the second the same ratio that the third has to the fourth.
Σελίδα 138 - RULE. from half the sum of the three sides, subtract each side separately; multiply the half sum and the three remainders together, and the square root of the product will be the area required.
Σελίδα 304 - If two triangles have one angle of the one equal to one angle of the other and the sides about these equal angles proportional, the triangles are similar.
Σελίδα 44 - America, but know that we are alive, that two and two make four, and that the sum of any two sides of a triangle is greater than the third side.