Elements of Geometry and Trigonometry

ABCD altitude apothem Applying logarithms centre chord circle circumference complement cone convex surface cosec cosine Cotang cylinder decimal demonstrated in Book denote diameter distance divided draw Equation feet find the area Find the logarithmic following RULE frustum given angle greater half sum hence hypothenuse included angle inscribed intersection less Let ABC log cos log cot log sin lower base lune mantissa measured multiplied number corresponding number of sides parallel parallelogram parallelopipedon perpendicular plane MN polar triangle polyedral angle polyedron principle demonstrated prism proportional PROPOSITION proved pyramid quadrant radii radius rectangle regular polygon right angles right-angled triangle Scholium segment semi-circumference sine six right slant height solution sphere spherical angle spherical excess spherical polygon spherical triangle square straight line subtracting Tang tangent THEOREM triangle ABC upper base vertex volume whence write the following