New Plane Geometry

AABC ABCD acute angle adjacent angles altitude angle formed angles are equal apothem arc degrees base bisects central angle chord circumscribed Construct a triangle COROLLARY corresponding sides diagonals diameter distance divided Draw drawn equal angles equal arcs equal circles equiangular equilateral triangle EXERCISES exterior angle Find the area geometry given circle given line given point given triangle HINT hypotenuse interior intersect isosceles triangle line segment locus of points measure median mid-point number of sides obtuse opposite sides parallel lines parallelogram perimeter perpendicular bisector points equidistant PROPOSITION prove quadrilateral radii radius ratio rectangle regular polygon rhombus right angle right triangle secant similar polygons similar triangles square straight angle straight line supplementary tangent TEST theorem transversal trapezoid triangle ABC triangle are equal triangles are congruent unequal vertex angle vertices Write the proof