| Sandhurst roy. military coll - 1880 - 68 pages
...straight line. Hence show how a given straight line may be divided into any number of equal parts. 7. **The rectangle contained by the diagonals of a quadrilateral...both the rectangles contained by its opposite sides.** 8. Define the tangent of an angle, find the value of tan 60°, and prove that tan (180 — A) = —... | |
| Woolwich roy. military acad, Walter Ferrier Austin - 1880 - 190 pages
...Show that, whatever be the length of the arc PQ, LP always meets OA produced in a fixed point. 11. **The rectangle contained by the diagonals of a quadrilateral figure inscribed in a circle is equal to** the sum of the rectangles contained by the opposite sides. ALGEBEA. 1 . Show that the result is the... | |
| Oxford univ, local exams - 1880 - 394 pages
...their homologous sides. Bisect a given triangle by a straight line drawn parallel to the base. 11. **The rectangle contained by the diagonals of a quadrilateral figure inscribed in a circle is equal to** the sum of the rectangles contained by its opposite sides. 12. If a straight line stand at right angles... | |
| Euclides - Euclid's Elements - 1881 - 236 pages
...is equal to the rectangle E A. AD (VI. 16). Therefore, if from any angle, &c. QED PROP. D. THEOR,EM. **The rectangle contained by the diagonals of a quadrilateral figure inscribed in a circle, is** equa I to both the rectangles contained by its opposite sides. Let ABCD he any quadrilateral figure... | |
| James Gow - Mathematics - 1884 - 350 pages
...now appended to Euclid vi. (D), that " the rectangle contained by the diagonals of a quadrilateral **inscribed in a circle is equal to both the rectangles contained by its opposite** sides1", and then proceeds to shew how from the chords of two arcs that of their sum and difference... | |
| E. J. Brooksmith - Mathematics - 1889 - 354 pages
...Equiangular parallelograms have to one another the ratio which is compounded of the ratio of their sides. 1 **1 . The rectangle contained by the diagonals of a...quadrilateral figure inscribed in a circle is equal to** the two rectangles contained by the opposite sides. II. ARITHMETIC. (Including the use of Common Logarithms.)... | |
| Royal Military College, Sandhurst - Mathematics - 1890 - 144 pages
...similar triangles are to one another in the duplicate ratio of their homologous sides. 6. Prove that **the rectangle contained by the diagonals of a quadrilateral...both the rectangles contained by its opposite sides.** What does this theorem become when the quadrilateral is a rectangular parallelogram ? ' 7. Prove that... | |
| Queensland. Department of Public Instruction - Education - 1890 - 530 pages
...is divided by the point of contact of the inscribed circle is equal to the area of the triangle. 7. **The rectangle contained by the diagonals of a quadrilateral figure inscribed in a circle is equal to** the sum of the rectangles contained by pairs of opposite sides. If the quadrilateral cannot be inscribed... | |
| Florian Cajori - Mathematics - 1896 - 338 pages
...which seems original with him. After proving the proposition, now appended to Euclid, VI. (D), that **"the rectangle contained by the diagonals of a quadrilateral...both the rectangles contained by its opposite sides,"** he shows how to find from the chords of two arcs the chords of 1 JL HEIRERG in Bibliotheca Mathematica,... | |
| Education - 1917 - 908 pages
...PTOLEMY'S THEOREM. By ALBERT BABBITT, University of Nebraska, Lincoln. Ptolemy's theorem states that **"the rectangle contained by the diagonals of a quadrilateral...equal to both the rectangles contained by its opposite** sides."1 By means of this theorem and the Law of Sines, the addition and subtraction formulas of trigonometry... | |
| |