1. 9/16/09 Unit 1 Vocabulary Point – an exact location
These lines intersect at Point N. N

2. 9/16/09 Unit 1 Vocabulary
Point – an exact location
These lines intersect at Point N. N
Line – a straight path that extends forever in opposite directions P R
PR or RP

3. 9/16/09 Unit 1 Vocabulary
Point – an exact location
These lines intersect at Point N. N
Line – a straight path that extends forever in opposite directions P R
PR or RP
Line segment – part of a line between 2 points
EF or FE E F

4. 9/16/09 Unit 1 Vocabulary
Point – an exact location
These lines intersect at Point N. N
Line – a straight path that extends forever in opposite directions P R
PR or RP
Line segment – part of a line between 2 points E F
EF or FE
Ray – part of a line continuing forever in one direction MN M N

5. 9/17/09 Unit 1 Vocabulary
Angle – a figure formed by two rays or two line segments with a common endpoint called the vertex. The rays or segments are called the sides of the angle. A B C
ABC
CBA or
B is the vertex of this angle. It is the point at which two sides of an angle meet.

6. Right angle – a square corner, or 90◦ angle
9/17/09 Unit 1 Vocabulary
Angle – a figure formed by two rays or two line segments with a common endpoint called the vertex. The rays or segments are called the sides of the angle. B A C
ABC
CBA or
B is the vertex of this angle. It is the point at which two sides of an angle meet.
Right angle – a square corner, or 90◦ angle

7. Different trapezoids: