Elements of Geometry, Μέρος 1

ABCD adjacent angles altitude angles of parallel apothem assigned quantity bisecting bisector centre of symmetry chord circle whose radius circumference circumscribed circle coincide construct a square decagon diagonals diameter distance divided Draw equally distant equiangular polygon equilateral triangle Exercise.-The exterior angle Find the area given circle given line given point given straight line GIVEN TO PROVE given triangle Hence homologous sides hypotenuse included angle inscribed polygon inscribed regular intersection isosceles triangle length locus mean proportional measured by arc middle points number of sides one-nth opposite sides parallel to BC parallelogram perimeter perpendicular Q. E. D. PROPOSITION quadrilateral radii ratio of similitude rectangle regular hexagon regular inscribed regular polygon respectively equal rhombus right angles right triangle segment square equivalent straight line joining symmetry tangent THEOREM third side triangle ABC triangles are equal unequal vertex vertices