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altitude Apply approaches ARGUMENT axis base called circle circumference circumscribed common Compare construct contains corresponding cube cubic cylinder denoted determined diagonals diameter dihedral angles distance divided draw drawn edges element equal equidistant equivalent exercise face feet figure Find the volume four frustum geometry given given plane given point greater HINT inches included inscribed intersect intersecting planes lateral area lateral edges less limit lune measure Note number of sides oblique opposite parallel pass perimeter perpendicular plane MN pole polyhedral angle polyhedron prism proof Prop PROPOSITION prove pyramid Questions radius ratio REASONS rectangular parallelopiped regular respectively revolving right circular cone sides similar slant height solid space sphere spherical triangle straight line student surface tangent tetrahedron THEOREM third total area triangular trihedral unit vertex vertices zone
Σελίδα 455 - The sum of the angles of a spherical triangle is greater than two and less than six right angles ; that is, greater than 180° and less than 540°. (gr). If A'B'C' is the polar triangle of ABC...
Σελίδα 397 - The lateral area of a cylinder is equal to the product of the perimeter of a right section of the cylinder by an element. Hyp. S is the lateral area, P the perimeter of a right .section, and E an element of the cylinder AK; S...
Σελίδα 361 - COR. 2. The volume of a rectangular parallelopiped is equal to the product of its base by its altitude.
Σελίδα 321 - The acute angle that a straight line makes with its own projection upon a plane is the least angle that it makes with any line passing through its foot in the plane.
Σελίδα 469 - The altitude of a regular triangular pyramid, each side of whose base is 4 ft., is 12 ft. Find the area of a section made by a plane parallel to the base and 4 ft. from the vertex. Ex.
Σελίδα 296 - Two triangles which have an angle of one equal to the supplement of an angle of the other are to each other as the products of the sides including the supplementary angles.
Σελίδα 328 - If from the foot of a perpendicular to a plane a straight line is drawn at right angles to any line in the plane, the line drawn from its intersection with the line in the plane to any point of the perpendicular is perpendicular to the line of the plane.
Σελίδα 314 - If a straight line is parallel to a plane, the intersection of the plane with any plane passed through the given line is parallel to that line. Let...