Elements of Geometry, Part 1

ABCD altitude apply base bisector bisects called centre chord circle circumference circumscribed coincide common construct contains conversely corresponding describe diagonals diameter difference distance divided draw drawn equal equation equilateral triangle equivalent Exercise external extremities fall figure Find four GEOMETRY given given straight line GIVEN—the greater half Hence hypotenuse included inscribed intersection isosceles length less limit line joining locus mean proportional measured meet method middle points opposite sides parallel parallelogram passes perpendicular polygon position PROBLEMS PROPOSITION PROVE quadrilateral quantity radii radius ratio ratio of similitude rect rectangle regular polygon right angles right triangle segments sides similar square straight line Substituting tangent THEOREM third side triangle ABC triangle is equal turns unequal unit vertex vertices