Basic Geometry, Manual for Teachers |
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A₁ algebra Angle Measure assumptions BASIC GEOMETRY bisect book theorems central angle Chapter chord coincide congruent Consequently consider constructions Corollary 12c corresponding defined definition demonstrative geometry diagonals diameter directed angles draw end-point equation equiangular polygon equidistant equilateral equilateral polygon Euclid figures follows fundamental given circle given line given point half-line hypothesis idea inches isosceles triangles length Lesson Plan Outline line segment line-segments locus logical system mathematics means mid-point number system pairs parallel lines parallelogram partial converses perpendicular bisector plane point in common point of intersection polygon postulates Principle 9 proof proposition prove pupil Pythagorean Theorem quadrilateral radius rational numbers real numbers rectangle reflex angles right triangle shown in Fig similar triangles skew lines sort square straight line system of real tangent teacher Theorem 13 tion triangle ABC true undefined term varies continuously vertex word