Key to Geometry, Book 8: Triangles, Parallel Lines, Similar Polygons

by Newton Hawley Author

(From Amazon): Key to Geometry offers a non-intimidating way to prepare students for formal geometry as they do step-by-step constructions. Using only a pencil, compass, and straightedge, students begin by drawing lines, bisecting angles, and reproducing segments. Later they do sophisticated constructions involving over a dozen steps and are prompted to form their own generalizations. When they finish, students have been introduced to 134 geometric terms and are ready to tackle formal proofs. Book 8 covers Triangles, Parallel Lines, Similar Polygons.Format: PaperbackPublisher: Key Curriculum Press


Additional Details

Resource Type
Print Status
In Print
Suggested Grades
9th - 10th
Key Curriculum Press


  • 1 perpendicular bisector of a segment- review
  • 2 perpendicular bisectors of the sides of a polygon- review
  • 3 The perpendicular from a point to a line- review
  • 4 comparing and bisecting angles- tha angle bisectors of a triangle
  • 5 practice test
  • 6 correct test
  • 7 the perpendicular to a line through a point on the line- constructing an angle congruent to a given angle
  • 8 corresponding angles- review
  • 9 the line joining the midpoints of two sides fo a triangle- review
  • 10 the line through the midpoint...- review
  • 11 the line through the mid oing of one side of a triangle...- review
  • 12 dividing a segment...- central and inscribed angles
  • 13 review- inscribed angles
  • 14 practice test
  • 15 correct test
  • 16 constructing a triangle with sides congruent...- review
  • 17 consturcting a triangle with sides half those...- review
  • 18 similar triangles- review
  • 19 constructing a triangle...- review
  • 20 similar equilateral...- review
  • 21 the triangle formed by the midpoints...- similar traingles in a circle
  • 22 practice test
  • 23 correct test

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