Humanized Geometry: (an Introduction to Thinking)

AABC ABCD acute angle altitude angles are equal apothem assumptions Axiom base bisects central angles circumference common unit conclusion Construct a triangle Corollary deductive reasoning determine diagonals diameter distance Draw Egyptians equal angles equal arcs equal circles equilateral triangle Euclid EXERCISE exterior angle feet Find the locus geometry given line given points Greeks gruent Hence hypotenuse inches included angle inductive inscribed isosceles triangle items by writing length measured by one-half median method mid-point number of sides one-half arc opposite sides parallel lines parallelogram perimeter perpendicular bisector plane figures point equidistant point of intersection polygon Postulate Problem PROPOSITION Proposition 22 Prove Pythagoras quadrilateral radii radius ratio reasoning rectangle regular polygon right angles right triangle segment Show straight angle straight line subtend tangent Thales thinking third side tion transversal trapezoid triangle ABC triangle are equal triangles are congruent True False truth vertex vertical angles