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

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

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

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

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.

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

Different trapezoids: