Elements of the Geometry of Planes and Solids: With Four Plates

ABCD altitude angle equal APPLIC base called centre chord circle circumference common cone construction contain Corol cylinder Demonstr describe determine diagonal diameter difference distance divided double draw drawn equal equal angles equal base equal sides evidently expression fall figure four Geometry given given angle given point given triangle gives gles greater half inclination inscribed intersection join less lies line BC meet obtained opposite parallel parallel planes parallelepiped parallelogram passing perpendicular plane poligon principles prisms PROBLEM Proof proportional proposition protracted proved pyramid radii radius ratio rectilineal figure regular remains respectively result right angles Scholium segment sides similar smaller solid angle Solution sphere square straight line Suppose supposition surface taken tangent thence THEOREM third side three plane touch triangle ABC whole