An Elementary Treatise on Geometry: Simplified for Beginners Not Versed in Algebra. Part I, Containing Plane Geometry, with Its Application to the Solution of Problems, الجزء 1

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Carter, Hendee, 1834 - 190 من الصفحات
 

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الصفحة 148 - Upon a given straight line to describe a segment of a circle, which shall contain an angle equal to a given rectilineal angle.
الصفحة 72 - If two triangles have two sides of the one equal to two sides of the other, each to each, but the...
الصفحة 128 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds.
الصفحة 115 - 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.
الصفحة 110 - The side of a regular hexagon inscribed in a circle is equal to the radius of the circle.
الصفحة 121 - The areas of two regular polygons of the same number of sides are to each other as the squares of their radii, or as the squares of their apothems.
الصفحة 148 - A, with a radius equal to the sum of the radii of the given circles, describe a circle.
الصفحة 84 - ... any two triangles are to each other as the products of their bases by their altitudes.
الصفحة 129 - P is at the center of the circle. II. 18. The sum of the arcs subtending the vertical angles made by any two chords that intersect, is the same, as long as the angle of intersection is the same. 19. From a point without a circle two straight lines are drawn cutting the convex and concave circumferences, and also respectively parallel to two radii of the circle. Prove that the difference of the concave and convex arcs intercepted by the cutting lines, is equal to twice the arc intercepted by the radii.

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