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ABCDE altitude base bounded called chords circle circular cone circumference coincide common cone congruent construct Corollary corresponding cube cylinder denoted diagonal diameter differ dihedral angle distance divide Draw drawn equal equidistant EXERCISES face angles faces figure Find follows formula four frustum Geometry given line given point greater half Hence included inscribed intersection lateral area lateral edges length less locus lune means measured meet oblique opposite parallel planes parallelogram pass perimeter perpendicular placed plane plane MN polar pole polygon polyhedral angle polyhedron portion prism Problem Proof proportional prove pyramid radius ratio regular regular pyramid respectively right angles right circular right section right triangle segment Show sides similar slant height solids space sphere spherical triangle square straight line surface symmetric tangent tetrahedron Theorem third trihedral unequal unit vertex vertices volume
Page xxxv - If two triangles have two sides of the one equal to two sides of the...
Page 222 - If two angles not in the same plane have their sides respectively parallel and lying on the same side of the straight line joining their vertices, they are equal, and their planes are parallel. Let the corresponding sides of angles A and A' in the planes MN and PQ be parallel, and lie on the same side of AA'.
Page 287 - THEOREM. Every section of a sphere, made by a plane, is a circle.
Page 224 - Theorem. —A line perpendicular to one of two parallel lines is perpendicular to the other.
Page 226 - V 678. // a straight line is perpendicular to a plane, every plane containing this line is perpendicular to the given plane.
Page 220 - If a line is perpendicular to each of two lines at their point of intersection, it is perpendicular to their plane. Given FB perpendicular at B to each of two straight lines AB and BC of the plane MN. To prove FB perpendicular to the plane MN.
Page 254 - A truncated pyramid is the portion of a pyramid included between the base and a plane not parallel to the base.
Page xlii - The area of a rectangle is equal to the product of its base and altitude. Given R a rectangle with base b and altitude a. To prove R = a X b. Proof. Let U be the unit of surface. .R axb U' Then 1x1 But - is the area of R.