Elements of Plane Geometry: For the Use of SchoolsLewis & Sampson, 1844 - 96 sider |
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Resultat 1-5 av 14
Side 17
... . Let EF be drawn perpendicular to △ - AB ; now , because it cuts the two parallels , it makes the alternate angles AIF , Fig . 10 . E I B -D EOD , equal , and since AIO is a right 2 * BOOK I. ] 17 PARALLEL LINES . Fig. 8. ...
... . Let EF be drawn perpendicular to △ - AB ; now , because it cuts the two parallels , it makes the alternate angles AIF , Fig . 10 . E I B -D EOD , equal , and since AIO is a right 2 * BOOK I. ] 17 PARALLEL LINES . Fig. 8. ...
Side 29
... cutting the parallels AB , DC , makes the alternate angles ABD , BDC , equal ( Prop . 9 ) ; hence the triangles ABD , CDB , having the two sides AB , BD , and the included angle ABD of the one , equal re- spectively to the sides CD , BD ...
... cutting the parallels AB , DC , makes the alternate angles ABD , BDC , equal ( Prop . 9 ) ; hence the triangles ABD , CDB , having the two sides AB , BD , and the included angle ABD of the one , equal re- spectively to the sides CD , BD ...
Side 32
... cutting the circumference of the circle , and lying partly within and partly without the circle . B D. E 11. A tangent is a line which touches the circumfer- ence in only one point , which is called the point of con- tact . AB is a ...
... cutting the circumference of the circle , and lying partly within and partly without the circle . B D. E 11. A tangent is a line which touches the circumfer- ence in only one point , which is called the point of con- tact . AB is a ...
Side 43
... , de- scribe an arc , and from D as a centre , with the A → C Fig . 43 . H I B D same radius , describe an arc cutting the former at H. Draw HI , and it will be the perpendicular required воок III . ] 43 PERPENDICULARS .
... , de- scribe an arc , and from D as a centre , with the A → C Fig . 43 . H I B D same radius , describe an arc cutting the former at H. Draw HI , and it will be the perpendicular required воок III . ] 43 PERPENDICULARS .
Side 44
... cutting the line in C , D ; and from these points as cen- tres , with a radius greater than half CD , describe two arcs cutting each other at B. Draw from B to A a line , and AI will be the perpen- Fig . 44 . -XA dicular sought ...
... cutting the line in C , D ; and from these points as cen- tres , with a radius greater than half CD , describe two arcs cutting each other at B. Draw from B to A a line , and AI will be the perpen- Fig . 44 . -XA dicular sought ...
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Elements of Plane Geometry: For the Use of Schools Nicholas Tillinghast Uten tilgangsbegrensning - 1844 |
Elements of Plane Geometry: For the Use of Schools Nicholas Tillinghast Uten tilgangsbegrensning - 1844 |
Elements of Plane Geometry: For the Use of Schools - Primary Source Edition Nicholas Tillinghast Ingen forhåndsvisning tilgjengelig - 2013 |
Vanlige uttrykk og setninger
ABCD adjacent angles allel alternate angles altitude angle ABC angles ABD angles is equal antecedent and consequent B. I. Ax base centre circle whose radius circumference circumscribed circumscribed circle Converse of Prop describe an arc diagonal diameter divide draw the line equal angles equal B. I. Prop equal chords equal Prop equal respectively equiangular equivalent feet given angle given line given point given side half hence the triangles hypotenuse included angle inscribed angle Let the triangles line drawn linear units longer than AC multiplied number of sides oblique lines parallel to CD parallelogram perimeter perpendicular PROBLEM prove radii rectangle regular polygons respectively equal right angles Prop right-angled triangle Scholium sides AC similar subtended tangent THEOREM three sides triangles ABC triangles are equal vertex
Populære avsnitt
Side 31 - A circle is a plane figure bounded by a curved line, every point of which is equally distant from a point within called the center.
Side 63 - The square described on the hypothenuse of a right-angled triangle is equivalent to the sum of the squares described on the other two sides.
Side 70 - 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. A D A' Hyp. In triangles ABC and A'B'C', To prove AABC A A'B'C' A'B' x A'C ' Proof. Draw the altitudes BD and B'D'.
Side 53 - In any proportion, the product of the means is equal to the product of the extremes.
Side 87 - The perimeters of two regular polygons of the same number of sides, are to each other as their homologous sides, and their areas are to each other as the squares of those sides (Prop.
Side 54 - In a series of equal ratios, any antecedent is to its consequent, as the sum of all the antecedents is to the sum of all the consequents. Let a: 6 = c: d = e :/. Then, by Art.
Side 81 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Side 59 - The area of a parallelogram is equal to the product of its base and its height: A = bx h.
Side 61 - From this proposition it is evident, that the square described on the difference of two lines is equivalent to the sum of the squares described on the lines respectively, minus twice the rectangle contained by the lines.
Side 82 - The side of a regular hexagon inscribed in a circle is equal to the radius of the circle.