Basic Geometry

altitude assumptions bisects called central angle chapter chord circumference circumscribed common external tangents common internal construction converse coördinates Corollary decagon definition diagonals diagram diameter directed angle distance divide draw drawn equal arcs equal numbers equal to half equation equiangular polygon equidistant EXERCISES figure Find the locus follows geometry given circle given line given point half-lines hypotenuse idea inches inscribed angle inscribed regular polygon isosceles length line segment Locus Theorem logical system means method mid-point number of sides parallelogram pentagon perimeter perpendicular bisector plane point in common Principle proof proportional proposition protractor Prove Pythagorean Theorem quadrilateral radical axis radii ratio real number rectangle regular polygon respectively right angle right triangle secant shown in Fig similar triangles skew lines sphere square straight line straightedge and compasses tangent externally tion Triangle ABC Fig triangle are equal varies continuously vertex vertices