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Inhoudsopgave

 E IS 1 awi ? 9 E 10 10 E 11 11 After E 10 2 may be read 12 S 13 S 14 S 15
 S 57 S 58 S 59 S 60 S 61 S 62 S 63 S 64

 S 16 3 18 S 19 S 22 S 23 may be read S 24 S 25 S 26 S 27 S 28 S 29 S 30 S 31 S 32 S 33 S 34 S 35 S 36 S 37 S 38 S 39 S 41 S 42 S 43 S 44 S 45 S 46 S 47 S 48 S 49 S 50 S 51 S 52 S 53 r S 54 S 55 S 56
 S 65 S 66 S 67 S 68 S 69 S 70 S 71 S 72 S 73 S 74 S 75 S 76 S 77 S 78 S 80 S 81 S 82 S 83 S 84 S 85 S 86 S 88 S 89 S 90 BOOK II 92 E 3 6 117 6 164 S 73 175 S 74 202 S 75 203 BOOK IV 247 4 255 4 261 4 269 I 314 S 11 375

Populaire passages

Pagina 320 - The areas of two triangles which have an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles. D c A' D' Hyp. In triangles ABC and A'B'C', ZA = ZA'. To prove AABC = ABxAC. A A'B'C' A'B'xA'C' Proof. Draw the altitudes BD and B'D'.
Pagina 368 - If from the vertical angle of a triangle a straight line be drawn perpendicular to the base, the rectangle contained by the sides of the triangle is equal to the rectangle contained by the perpendicular and the diameter of the circle described about the...
Pagina 92 - If there be two straight lines, one of which is divided into any number of parts, the rectangle contained by the two straight lines is equal to the rectangles contained by the undivided line, and the several parts of the divided line.
Pagina 16 - ... angles equal; and conversely if two angles of a triangle are equal, two of the sides are equal. 3. If two triangles have the three sides of one equal to the three sides of the other, each to each, do you think the two triangles are alike in every respect ? 4. If two triangles have the three angles of one equal to the three angles of the other, each to each, do you think the two triangles are necessarily alike in every respect ? 5. Draw two triangles, the angles of one being equal to the angles...
Pagina 351 - Divide a straight line into two parts such that the rectangle contained by the whole line and one of the parts shall be equal to the square on the other part.
Pagina 298 - ... line and the extremities of the base have the same ratio which the other sides of the triangle have to one...
Pagina 203 - 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...
Pagina 369 - Wherefore, in equal circles &c. QED PROPOSITION B. THEOREM If the vertical angle of a triangle be bisected by a straight line which likewise cuts the base, the rectangle contained by the sides of the triangle is equal to the rectangle contained by the segments of the base, together with the square on the straight line which bisects the angle.
Pagina 102 - In every triangle, the square of the side subtending any of the acute angles is less than the squares of the sides containing that angle by twice the rectangle contained by either of these sides, and the straight line intercepted between the perpendicular let fall upon it from the opposite angle, and the acute angle. Let ABC be any triangle, and the angle at B one of its acute angles, and upon BC, one of the sides containing it, let fall the perpendicular...
Pagina 19 - 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 ; it is required to draw a straight line through the point A, parallel to the straight hue BC. In BC take any point D, and join AD; and at the point A, in the straight line AD, make (I.