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

## by Newton HawleyAuthor

(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

#### Tags:

Resource Type
Book
ISBN
091368478-3
Print Status
In Print
lessons
23
Pages
138
9th - 10th
Publisher
Key Curriculum Press
1972

### lessons

• 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