Elements of Plane Geometry: For the Use of SchoolsLewis & Sampson, 1844 - 96 σελίδες |
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Σελίδα 31
... circle is a space enclosed by a curve line , every point of which is equally distant from a point within ; which point is called the centre . 3. The boundary of a circle is called its circumfer- ence . 4. A radius is a line drawn from ...
... circle is a space enclosed by a curve line , every point of which is equally distant from a point within ; which point is called the centre . 3. The boundary of a circle is called its circumfer- ence . 4. A radius is a line drawn from ...
Σελίδα 32
... circle is the portion included between two radii . BDC , the part of the circle between BC , CD , and the arc BD , is a sector . 10. A secant is a line cutting the circumference of the circle , and lying partly within and partly without ...
... circle is the portion included between two radii . BDC , the part of the circle between BC , CD , and the arc BD , is a sector . 10. A secant is a line cutting the circumference of the circle , and lying partly within and partly without ...
Σελίδα 33
For the Use of Schools Nicholas Tillinghast. 17. A circle is inscribed in a polygon , when its cir- cumference touches each side of the polygon ; and the polygon is then said to circumscribe the circle . 18. Equal circles are those which ...
For the Use of Schools Nicholas Tillinghast. 17. A circle is inscribed in a polygon , when its cir- cumference touches each side of the polygon ; and the polygon is then said to circumscribe the circle . 18. Equal circles are those which ...
Σελίδα 34
... circles , equal angles at the centre are subtended by equal arcs . Let C be the centre of the circle , and let the angle ACB be equal to ECD ; then we have to prove that the arcs AB , DE , which subtend these angles , are equal . Fig ...
... circles , equal angles at the centre are subtended by equal arcs . Let C be the centre of the circle , and let the angle ACB be equal to ECD ; then we have to prove that the arcs AB , DE , which subtend these angles , are equal . Fig ...
Σελίδα 35
... circle , or in equal circles , equal arcs sub- tend equal angles at the centre . Let ( as in Prop . 3 ) the arc AB be equal to the arc DE ; then we have to prove that the angles ACB , DCE , are equal . If ACB were applied to DCE , the ...
... circle , or in equal circles , equal arcs sub- tend equal angles at the centre . Let ( as in Prop . 3 ) the arc AB be equal to the arc DE ; then we have to prove that the angles ACB , DCE , are equal . If ACB were applied to DCE , the ...
Άλλες εκδόσεις - Προβολή όλων
Elements of Plane Geometry: For the Use of Schools - Primary Source Edition Nicholas Tillinghast Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2013 |
Συχνά εμφανιζόμενοι όροι και φράσεις
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
Δημοφιλή αποσπάσματα
Σελίδα 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.
Σελίδα 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.
Σελίδα 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'.
Σελίδα 53 - In any proportion, the product of the means is equal to the product of the extremes.
Σελίδα 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.
Σελίδα 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.
Σελίδα 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.
Σελίδα 59 - The area of a parallelogram is equal to the product of its base and its height: A = bx h.
Σελίδα 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.
Σελίδα 82 - The side of a regular hexagon inscribed in a circle is equal to the radius of the circle.