Elements of Geometry

acute altitude base bisect called centre chord circle circumference circumscribed coincide common Cons contained COROLLARY describe diagonals diameter difference direction divided Draw equal equal distances equal respectively equiangular equilateral equivalent erected extremities fall figure formed four given greater Hence homologous sides hypotenuse included inscribed intercept intersect isosceles joining less Let A B limit line A B line drawn mean measured meet middle point multiplied number of sides one-half opposite sides parallelogram perimeter perpendicular plane position PROBLEM proportional PROPOSITION prove Q. E. D. PROPOSITION quadrilateral quantities radii radius equal ratio rect rectangles regular polygon respectively right angles segment Show similar similar polygons square straight line Substitute subtend surface symmetrical Take taken tangent THEOREM triangle variable vertex vertices