1. Welcome Back! 1.Entry Task on your desks. Please start it. If you don’t have a compass, there are some over on the counter. 2.If you have your signed syllabus, please put it in the folder. 3.If you have your letter, please put it in the folder.

2. 1.1REVIEW OF SOME BASIC IDEAS Undefined Terms of Geometry Point, line, plane, distance along a line, betweenness, space, and distance around a circular arc are all left as undefined terms: That is they are only given intuitive descriptions. BUT FROM THESE we can define everything else in Geometry. The entire system depends on these!

3. Giving the undefinable a description… Point – Most basic building block of geometry. It has no size. It only has a location. Named with a capital letter. A Point A

4. Line – a straight, continuous arrangement of infinitely many points. It has infinite length but no thickness. It extends forever in two directions. l

5. PLANE – has length and width but no thickness. It is like a flat surface that extends infinitely along its length and width. Can be named plane ABC or Plane K.

7. A circle is the set of all points in a plane that are equidistant from a given point. This is circle A.

8. An equilateral triangle is a triangle with three congruent sides. A B C HOW WOULD EUCLID DO IT?