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### Popular passages

Page 305 - If two polygons are composed of the same number of triangles, similar each to each, and similarly placed, the polygons are similar.
Page 343 - A spherical angle is measured by the arc of a great circle described from its vertex as a pole, and included between its sides, produced if necessary.
Page 182 - The formula states that the square of the hypotenuse of a right triangle is equal to the sum of the squares of the base and altitude.
Page 51 - 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. Given A ABC and A'B'C...
Page 302 - O'G O'A' X O'B' O'C' OA X OB X OC V' O'EX O'F O'G O'EX O'FX O'G QED 633. DEF. Similar polyhedrons are polyhedrons that have the same number of faces similar each to each and similarly placed, and have their homologous polyhedral angles equal.
Page 288 - The volume of any prism is equal to the product of its base by its altitude.
Page 335 - A point on the surface of a sphere, which is at the distance of a quadrant from each of two other points, not the extremities of a diameter, is a pole of the great circle passing through these points.
Page 290 - All these triangles meet in a point called the vertex. The perpendicular distance from the vertex to the plane of the base is the altitude or the height of the pyramid.
Page 361 - A zone is a portion of the surface of a sphere included between two parallel planes.
Page 227 - A STRAIGHT line is perpendicular to a plane, when it is perpendicular to every straight line which it meets in that plane.