Plane and Solid GeometryGinn, 1904 - 473 σελίδες |
Αναζήτηση στο βιβλίο
Αποτελέσματα 1 - 5 από τα 38.
Σελίδα 210
... polygons , two homologous sides are 15 feet and 25 feet . The area of the first polygon is 450 square feet . area of ... REGULAR POLYGONS AND CIRCLES . 429. DEF . 210 BOOK IV . PLANE GEOMETRY .
... polygons , two homologous sides are 15 feet and 25 feet . The area of the first polygon is 450 square feet . area of ... REGULAR POLYGONS AND CIRCLES . 429. DEF . 210 BOOK IV . PLANE GEOMETRY .
Σελίδα 211
... , etc. , are equal . Therefore , the polygon ABC etc. is a regular polygon , being equilateral and equiangular . § 429 Q. E. D. PROPOSITION II . THEOREM . 431. A circle may be 211 REGULAR POLYGONS AND CIRCLES REGULAR POLYGONS AND CIRCLES.
... , etc. , are equal . Therefore , the polygon ABC etc. is a regular polygon , being equilateral and equiangular . § 429 Q. E. D. PROPOSITION II . THEOREM . 431. A circle may be 211 REGULAR POLYGONS AND CIRCLES REGULAR POLYGONS AND CIRCLES.
Σελίδα 212
... regular polygon . E Let ABCDE be a regular polygon . 1. To prove that a circle may be circumscribed about ABCDE . Proof . Let be the centre of the circle which may be passed through A , B , and C. § 258 Then and By subtraction , For and ...
... regular polygon . E Let ABCDE be a regular polygon . 1. To prove that a circle may be circumscribed about ABCDE . Proof . Let be the centre of the circle which may be passed through A , B , and C. § 258 Then and By subtraction , For and ...
Σελίδα 213
... polygon . § 231 2. To prove that a circle may be inscribed in ABCDE . Proof . Since the sides of the regular polygon are equal chords of the circumscribed circle , they are equally distant from the centre . $ 249 Therefore , the circle ...
... polygon . § 231 2. To prove that a circle may be inscribed in ABCDE . Proof . Since the sides of the regular polygon are equal chords of the circumscribed circle , they are equally distant from the centre . $ 249 Therefore , the circle ...
Σελίδα 214
... regular inscribed poly- gon ; and the tangents drawn at the points of division form a regular circumscribed polygon ... regular polygon . Proof . The sides AB , BC , CD , etc. , are equal . § 241 Therefore , the polygon is regular . § 430 2 ...
... regular inscribed poly- gon ; and the tangents drawn at the points of division form a regular circumscribed polygon ... regular polygon . Proof . The sides AB , BC , CD , etc. , are equal . § 241 Therefore , the polygon is regular . § 430 2 ...
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCDE AC² altitude apothem axis bisector bisects called centre chord circumference circumscribed coincide common construct curve denote diagonals diameter dihedral angles distance divided draw ellipse equidistant equilateral triangle equivalent face angles feet Find the area Find the locus frustum given circle given line given point given straight line given triangle greater Hence homologous homologous sides hypotenuse inches intersection lateral area lateral edges length limit middle point number of sides parallel planes parallelogram parallelopiped perimeter perpendicular plane MN polyhedral angle polyhedron prism prismatoid Proof prove Q. E. D. PROPOSITION radii radius ratio rectangle regular polygon regular pyramid respectively right angle right circular right triangle secant segments similar slant height sphere spherical polygon spherical triangle square surface tangent tetrahedron THEOREM trapezoid triangle ABC triangular prism trihedral vertex vertices
Δημοφιλή αποσπάσματα
Σελίδα 44 - If two triangles have two sides of the one equal, respectively, to two sides of the other, but the included angle of the first greater than the included angle of the second, then the third side of the first is greater than the third side of the second.
Σελίδα 276 - If two planes are perpendicular to each other, a straight line drawn in one of them perpendicular to their intersection is perpendicular to the other plane.
Σελίδα 52 - If the opposite sides of a quadrilateral are equal, the figure is a parallelogram.
Σελίδα 43 - If two angles of a triangle are unequal, the sides opposite are unequal, and the greater side is opposite the greater angle.
Σελίδα 193 - 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. To prove that Proof. A Let the triangles ABC and ADE have the common angle A. A ABC -AB X AC Now and A ADE AD X AE Draw BE.
Σελίδα 362 - A sphere is a solid bounded by a surface all points of which are equally distant from a point within called the centre.
Σελίδα 171 - In any triangle the product of two sides is equal to the product of the diameter of the circumscribed circle by the altitude upon the third side.
Σελίδα 73 - The sum of the perpendiculars dropped from any point within an equilateral triangle to the three sides is constant, and equal to the altitude.
Σελίδα 385 - Hence the two last are right angles ; hence the arc drawn from the vertex of an isosceles spherical triangle to the middle of the base, is at right angles to the base, and bisects the vertical angle.
Σελίδα 77 - PERIPHERY of a circle is its entire bounding line ; or it is a curved line, all points of which are equally distant from a point within called the centre.